Appellant Squires was indicted on two counts. The first charged a violation of 18 U.S.C. §§ 922(a) (6)1 and 924,2 and the second charged a violation of 18 U.S.C. §§ 922(h) 3 and 924. The jury below returned a verdict of guilty on the first count and a verdict of not guilty on the second count. Judgment was entered upon the guilty verdict and Squires was sentenced to 18 months in prison. This appeal requires us to define the word “knowingly” within the meaning of 18 U.S.C. § 922(a) (6) and to apply the definition in determining whether certain jury instructions were erroneous and whether others should have been given. For reasons subsequently set forth we reverse the judgment of guilty below and remand for a new trial on the first count.

The following outline of the facts appears to be undisputed. On December 20, 1968, one John Tortora appeared at Ed Agramonte, Inc., a sporting goods store in Yonkers, New York, which was licensed by the Government to sell firearms. Tortora ordered a .30 caliber carbine, asked to have an engraved nameplate bearing his son’s name placed on the gun, made a deposit on the purchase price, and agreed to return a few days later in order to take delivery. Appellant Squires, who was known to Mr. Agramonte as the operator of a nearby furniture store, accompanied Tortora on this occasion.

On December 24, 1968, Tortora returned to the store to pick up the gun, but was told that before he could take it he would have to produce a driver’s license or other suitable identification to be listed on a federal form. Tortora stated that he did not have such identification but would return later, and he left without the gun. A few hours later Tortora, accompanied by Squires, returned to the store. Squires informed Agramonte that he was there to pick up Tortora’s gun. Agramonte told Squires that he would have to present proper identification and was required to fill out certain necessary government forms. Agramonte then referred Squires and Tortora to his wife who was acting as bookkeeper.

Squires and Tortora explained the situation to Mrs. Agramonte who, on the basis of information listed on Squires’s automobile registration, then drew up a new bill of sale and a Form 4473 4 re-*862fleeting a sale to Squires rather than to Tortora. Squires then signed the Form 4473 in the space designated “transferee’s signature,” located immediately below the statement, “I certify that I am not prohibited by the provisions of Chapter 44 of Title 18, United States Code, or Title VII of the Omnibus Crime Control and Safe Streets Act of 1968 (Public Law 90-351, 82 Stat. 197, as amended, 18 U.S.C., Appendix) from.,receiving a firearm in interstate or foreign commerce.” The balance due on the gun was paid, and Mrs. Agramonte delivered the gun. The Government does not appear to contend that the gun was purchased otherwise than as a Christmas present for Tortora’s son, or that Squires’s participation in the transaction involved more than a personal favor to Tortora.

The only factual dispute centers around the signing of the Form 4473 by Squires. Mrs. Agramonte testified that, after she had prepared the form, she told Squires to read it and sign it. However, she could not remember whether she explained to him, as later became her custom, that the form was for the purpose of keeping guns out of the hands of drug users and criminals. Squires testified that Mrs. Agramonte merely told him to sign the form and that his understanding was that the completion of the form by filling in the required information was only a bookkeeping formality. He further testified that he did not read the form because the store was crowded and he did not wish to delay the customers waiting behind him. He denied any knowledge, at that time, of the prohibitions of the statutes cited in the certification statement.

It was stipulated that Squires had been convicted on a guilty plea in August 1964 of conspiring to violate 18 U.S.C. §§ 2314 and 2315 and it was also stipulated that the rifle being purchased at the Agramonte store had been transported in interstate commerce. Because of this 1964 conviction, Squires concedes that his certification on the Form 4473 which he signed was false.

At trial defense counsel requested a jury instruction to the effect that the jury could consider whether Form 4473 was reasonably designed to give a person adequate warning as to the gravamen of the certification. The denial of this request is assigned as error. In addition, when it became apparent that a government-submitted charge on recklessness was about to be accepted, defense counsel submitted a less stringent instruction on the issue and this substituted request was substantially accepted by the court.5 This instruction is now assigned as error. Although the instruction is almost verbatim the instruction submitted by the defense, we find no waiver of Squires’s claims of error for the defense had clearly objected to any instruction on the issue of recklessness. Furthermore, the only significant difference between the prosecution request with reference to recklessness and the defense request on that issue is in tone, so that any error was not invited by the substitution of the defense submission for the prosecution’s request. Although technically it would have been more appropriate for the defense to have made a specific *863reservation of the issue, sufficient notice of the objection was given to the court below, and, in any event, we find the instruction to have been plain error. Fed.R.Crim.P. 52(b).

Defense counsel, for the purpose of highlighting the lack of clarity in the form which Squires signed, attempted unsuccessfully to introduce into evidence a copy of Revised Form 4473 which was promulgated six months 6 after the 1968 Gun Control Act went into effect. Although the admissibility of the revised form is not urged on appeal, we find the revised form very instructive on the question of notice and on other issues in this ease and, therefore, we set forth its certification provision in the margin.7

As both assignments of error hinge on the proper definition of “knowingly” within the meaning of the statute, we turn first for enlightenment to the legislative history of the statute. The committee reports state that § 922(a) (6) “prohibits the making of false statements or the use of any deceitful practice {both knowingly) by a person in connection with the acquisition or attempted acquisition of a firearm.” 8 This passage clearly indicates a legislative intent to make knowledge a key element of the offense prohibited by the statute, but, although it may intimate that the word “knowingly” is to be used in its normal sense, it does not foreclose more sophisticated definitions. The Supreme Court, faced with a similar lack of legislative definition, adopted the Model Penal Code formulation:

When knowledge of the existence of a particular fact is an element of an offense, such knowledge is established if a person is aware of a high probability of its existence, unless he actually believes that it does not exist.

Leary v. United States, 395 U.S. 6, 46 n. 93, 89 S.Ct. 1532, 23 L.Ed.2d 57 (1969), citing Model Penal Code 27 (A.L.I. Prop.Official Draft, 1962). This formulation is merely a more comprehensive version of the lay definition of “knowledge” in that it recognizes that there are many facts which one does not “know with certainty,” and it comports with the use of “knowingly” in other criminal statutes. See, e. g., Pauldino v. United States, 379 F.2d 170 (10 Cir. 1967); Freije v. United States, 386 F.2d 408 (1 Cir. 1967), on appeal after remand, 408 F.2d 100 (1 Cir.), cert. denied, Saia v. United States, 396 U.S. 859, 90 S.Ct. 129, 24 L.Ed.2d 111 (1969); Popeko v. United States, 294 F.2d 168, 170 (5 Cir. 1961), cert. denied, 374 U.S. 835, 83 S.Ct. 1883, 10 L.Ed.2d 1056 (1963); United States v. Hines, 256 F.2d 561, 563-564 (2 Cir. 1958); Graves v. United States, 252 F.2d 878 (9 Cir. 1958); Bateman v. United States, 212 F.2d 61, 70 and n. 6 (9 Cir. 1954). The cases cited by the Government that deal with the enforcement of the Securities laws are distinguishable. In those areas of fiduciary responsibility the persons issuing statements are under an affirmative duty to investigate, and it is entirely appropriate to include “should have known” within the definition of “know.” We find those cases inapplicable here and we adopt the Model Penal Code formulation for the purposes of the statutes at issue in this case.

Inasmuch as knowledge is a specific element of the crime proscribed *864by § 922(a) (6), the maxim that “ignorance of the law is no defense” has no relevance here with reference to Squires’s purported ignorance of the provisions of Chapter 44 of Title 18 and of Title VII of the Omnibus Crime Control and Safe Streets Act of 1968. “Ignorance * * as to a matter of law is a defense if * * * ^e ignorance negatives the * * * knowledge * * * required to establish a material element of the offense. * * * ” Model Penal Code § 2.04(1) (a) (A.L.I.Prop.Official Draft, 1962); see G. Williams, Criminal Law: The General Part 160 (2d ed. 1961). However, whenever a defense of ignorance of the law or of ignorance of fact is claimed, it is recognized that one may not deliberately close his eyes to what otherwise would have been obvious to him. See, e. g., Greenway v. Maryland, 8 Md.App. 194, 259 A.2d 89, 91-92 (1969); G. Williams, supra at 159.

Turning from general principles to the present case, we find that the trial judge instructed the jury: “Thus, if you find * * * that had [the defendant Squires] read the form he would have known that he was prohibited from receiving the firearm, * * * you may find that the defendant acted wilfully and knowingly, even though he was actually ignorant of the prohibition of this statute.” The primary error in this instruction is that it is internally inconsistent. If Squires “were actually ignorant of the prohibition of [the statutes cited in the form],” it should be evident that “had he read the form” he would not “have known he was prohibited from receiving the firearm.”9 The instruction is also erroneous because it fails to differentiate between the two types of ignorance which Squires claimed to have insulated him from being guilty of “knowingly” making the false statement he concedes he made — his ignorance of what he was signing because of his purported failure to read the form, an ignorance of fact; and his ignorance as to what was prohibited by the cited statutes, an ignorance of the law.10 In order to convict Squires under § 922(a) (6), it was necessary for the jury to find either (1) that Squires had read the form and was “aware of a high probability” that he was prohibited by the cited statutes from receiving a firearm in interstate commerce, or (2) that he deliberately 11 avoided reading the form and that, if he had read it, he would have been “aware of a high probability” that he was prohibited by the cited statutes from receiving a firearm in interstate commerce. The trial court’s instructions were clearly insufficient on this point.12

*865Since Squires’s knowledge of the prohibitions of the cited statutes was a crucial issue at trial, counsel’s request to have the jurors instructed that the wording of Form 4473 might be considered by them in determining whether Squires had the requisite knowledge should have been granted. Although the court did instruct the jury to consider “the circumstances surrounding the transaction,” it appears that this instruction was principally submitted in connection with instructions as to whether Squires had acted “recklessly” in failing to read the form. While we do not decide that the initial version of Form 4473 is inadequate to support a conviction under § 922(a) (6) of all transferees who were prohibited by the cited statutes from receiving firearms in interstate commerce, we do believe that when the Government adopted the form it imposed upon itself an unusually difficult burden of proof as to a signer’s knowledge of his criminality. It can safely be said that many lawyers would not have understood, without the benefit of research, the import in the original form of the certification provision. To require a layman, without any explanation, to sign such a certification at his peril appears to us to be quite unrealistic. While it is possible that a defendant may be shown to have sufficient familiarity with the cited statutes, all that we are saying here is that the obscure language of the certification provision was highly relevant to Squires’s knowledge, and that the trial court should have so instructed the jury.

In conclusion, the errors below resulted primarily from the sincere efforts of a distinguished judge to deal with the unnecessary issues introduced by the inadequate drafting of the original Form 4473. Although ignorance of the law may conceivably arise as an issue even with the revised form, we expect that the revised form will eliminate much of the difficulty in the prosecution of eases under § 922(a) (6). The judgment of conviction is reversed, and the case is remanded for retrial on the first count.

(concurring):

I concur in the reversal of the judgment of conviction but for reasons differing somewhat from those expressed in the majority opinion. My problem is how to reconcile my own belief that the defendant did not “knowingly” commit the crime (1) with the trial court’s charge correctly (in my opinion) defining “knowingly” and (2) without usurping the fact-finding function of the jury.

Finding no errors of commission, I am quite convinced that an error of omission may well have been of vital importance to the jury’s deliberations, namely, the failure to direct the jury to consider whether Form 4473 was reasonably designed to give a person adequate warning as to the representations as to which he was certifying.

The government’s case depends almost entirely on the form which Squires signed. The first page of the form (Appendix hereto) is relied on by the government to establish notice. The only place for the transferee’s (the purchaser’s) signature is in a section entitled “Section B — Statement of Transferee” and under a paragraph reading as follows:

“I certify that I am not prohibited by the provisions of Chapter 44 of Title 18, United States Code, or Title VII of the Omnibus Crime Control and Safe Streets Act of 1968 (Public Law 90-351, as amended, 18 U.S.C., Appendix) from receiving a firearm in interstate or foreign commerce.”

A purchaser, while in the process of transacting a purchase and certainly under the circumstances attendant to the purchase here, could hardly be expected to hire a lawyer or go to a law library to ascertain the prohibitions of the statute. Moreover, the “Notice to Transferees” which contains the prohibitions is relegated to a position at the bottom of the form and far below any place for a transferee’s (purchaser’s) signature which might well escape his attention. Normally, a subscriber certifies or attests to that which appears above his *866signature — not to a paragraph of somewhat fine print at the bottom of the page below all signatures. Thus, the situation here is not unlike the “fine print” cases frequently involving passenger tickets, baggage claim checks, bills of lading and the like.

Since Congress made “knowingly” an essential element of the crime, I, therefore, would be better satisfied of Squires’ guilt had the element of notice been stressed in the instructions insofar as this particular form and its format were concerned.