A Brink’s еmployee was robbed at gunpoint while making a delivery to the Jamaica Plain branch of The *449 First National Bank of Boston in December, 1980. On June 1, 1981, the defendant pleaded guilty to three indictments occasioned by the event: armed robbery while masked, assault with intent to commit armеd robbery, and conspiracy. At the request of the Commonwealth, sentencing was postponed pending trial of two co-conspirators. When it became apparent at the disposition hearings in October, 1981, that the judge intended to impose a ten- to twenty-year Walpole sentence, the defendant, represented by new counsel, orally and later by written motion sought to withdraw his pleas. He claimed that it was his understanding that only a ten- to twelve-year sentence was to be entered and that other pending charges due to an incident in Revere would also be resolved. He was willing to abide by his plea and would also plead to the Revere charges if a sentence having the shorter maximum were imposed, but not otherwise. The judge imposed concurrent ten- to twenty-year sentences on the original plеas and denied the motion.
In his appeal the defendant argues that the judge erred in denying his motion to withdraw the pleas on the following grounds: the record does not affirmatively disclose the vol-untariness of the pleas because the Commonwealth failed to disclose the full plea bargain prior to acceptance of the plea; because the defendant was deprived of the effective assistance of counsel; and because the procedure was tainted by the judge’s looking at the defendant’s presentenсe report prior to the acceptance of the pleas, and by his failure to accord the defendant the right of allocution. We affirm.
1.
Standard of review.
In contrast to the stricter standards applicable to postconviction motions to withdraw guilty pleas, the Supreme Judiсial Court has pointed out that Mass.R.Crim.P. 12(c)(2)(B),
Rule 12(c) (2) (B), however, does not entitle a defendant to withdraw his plea as matter of right but only “in the discretion of the judge.” We note that
DeMarco
did not decide whether implicit in the rule is a requirement that the defendant advance a “plausible” or a “fair and just” reason. See cases cited in
DeMarco,
The record must, however, indicate that the plea was entered intelligently and voluntarily.
Boykin
v.
Alabama,
2. Voluntariness of plea in view of failure to disclose. The defendant argues that, because the judge accepted the defendant’s plea without full knowledge of the promises made by the Commonwealth, he was unable to determine the voluntariness of the plea. The facts do not support this contention.
Before the defendant’s рleas were accepted in June, 1981, both counsel informed the judge that the Commonwealth recommended concurrent Walpole sentences on the three indictments of not less than fifteen nor more than twenty
*451
years and that the defendant was going to ask for shorter sentences. See Mass.R.Crim.P. 12(b)(1)(C),
An examination of the trаnscript of the June hearing shows that the judge was assiduous in ensuring that the defendant fully understood the charges and the consequences of his plea. He informed the defendant, “I will listen to the recommendation that the Commonwealth makes. I certainly would not exceed it ... . And I will listen to what . . . your counsel has to say. But I will impose the sentence I deem appropriate, but I want you to know it will be within that range of not less than fifteen nor more than twenty .... So you know exactly what it is that you are pleading to.” In addition, the judge questioned the defendant with great care аs to the significance of a fifteen- to twenty-year sentence. The defendant’s answers leave no doubt that he recognized the full implications of the recommended sentences, both as to the time of eligibility for parole and the duration of such parole. 3
*452
While it is truе that disclosure of prosecutorial promises bears on the voluntariness of the plea, see Reporters’ Notes to Mass.R.Crim.P. 12(c), Mass. Ann. Laws, Rules of Criminal Procedure at 204-209 (1979), “adherence to or departure from [the procedures in rule 12(c) are] but one factor tо be considered.”
Commonwealth
v.
Johnson,
In view of the clarity of the record as to the defendant’s understanding of the import of the sentences and the judge’s willingness to follow the originally undisclosed recommendation and impose identical concurrent sentences on the Revere charges, we do not see (nor has the defendant suggested) how the failure to disclose the Commonwealth’s recommendation on the Revere charges in any way harmed the defendant or affected the voluntariness of his plea.
3.
Ineffective assistance of counsel.
The stark allegations of counsel’s failures in the defendant’s affidavit in support of his motion to withdraw his guilty pleas, repeated in the defendant’s brief on appeal, not only do not rise to the level of appellate argument, Mass.R.A.P. 16(a)(4), as amended,
The claim of conflict of interest on the bare assertion that counsel had previously — no indication as to when — served as a State trooper is without merit. Cf.
Commonwealth
v.
Smith,
Counsel’s failure to disсlose to the court the plea bargain as to the Revere charges did not deprive “the defendant of an otherwise available, substantial ground of defence.”
Commonwealth
v.
Saferian,
Also without merit is the allegation that defendant’s former counsel should have made some argument on behаlf of the defendant before sentencing. Here, sentencing did not occur until defendant’s former counsel had been replaced by defendant’s present counsel. In addition, there has been no showing of prejudice or indication of mitigating factors that could have beеn presented to the judge.
4.
Presentence report.
In the portion of the judge’s colloquy of June 1 with the defendant which concerned his knowing waiver of his right to trial by jury, the judge commented, “Now from looking over your past record, you certainly understand what a trial by jury is, right?” On the basis of this statement, the defendant claims that the judge improperly looked at the defendant’s prior criminal record, thus establishing “error of the clearest kind.”
Gregg v. United States,
*454 As indicated below, the defendant has not provided us with a record which enables us to determine whether the materials examined by the judge fell within the ambit of the Federal rule. We need not, therefore, determine in this case whether our rule, despite its very different language, imports considerations contained in the Federal rule or whether its drafters deliberately rejected the Federal rule which was itself relaxed in 1975 to allow examination of such reports with the consent of the defendant. In this connection the following comment of the Advisory Cоmmittee report which led to the 1975 amendment is significant. “Because many plea agreements will deal with the sentence to be imposed, it will be important ... for the judge to have access to sentencing information as a basis for deciding whether the plea agreement is an appropriate one.” 1974 Advisory Committee Notes to Fed.R.Crim.P. 32, 18 U.S.C.A., Federal Rules of Criminal Procedure, at 15 (West 1976).
The record is not unequivocal as to what the judge looked at. When counsel, after the refusal of the judge to allow withdrawal of the plea and prior to sentencing, asked the judge to recuse himself “because of the fact that the Court knew about his prior record,” the judge said, “I don’t know anything about his prior record.” Thus, as in
Gregg, supra
at 492-493, we do not have a record showing with sufficient clarity what was examined by the judge. See also
Commonwealth
v.
Martin,
*455
5.
Claim under Mass.R.Crim.P. 28(b).
The defendant’s claim under Mass.R.Crim.P. 28(b),
We conclude that there has been no showing of an abuse of discretion in the trial judge’s order denying the defendant’s motion to withdraw his pleas.
Order affirmed.
Notes
We note, however, that some of the considerations discussed in
DeMarco, supra
at 485-486, which provide the rationale for stricter stаndards for postconviction motions may also apply here. For example, the government may be, and has alleged in its brief that it was, prejudiced because the case against the codefendants has concluded without the defendant’s having been tried. See
United States
v.
Barker,
On October 26, 1981, prior to sentencing, the prosecutor and the defendant agreed to ten- to twelve-year sentences on the Revere charges, but the judge informed both counsel that he would not impose a sentence of less than ten to twenty years. The defendant then decided not to plеad to the Revere charges.
The unequivocal answers of the defendant appearing in the transcript undoubtedly led to his provident decision not to pursue in this court the claim made to the trial judge that the defendant misunderstood the sentence he was to receive. See
Commonwealth
v.
Morrow,
Rule 28(b) states, in pertinent part: “Before imposing sentencе the court shall afford the defendant or his counsel an opportunity to speak on behalf of the defendant and to present any information in mitigation of punishment.” The defendant’s rights are derived solely from the rule, as prior thereto a defendant had no constitutional or other rights to allocution.
Commonwealth
v.
Curry,
