Or. Rev. Stat. § 167.147
(1) A person commits the crime of possession of a gambling device if, with knowledge of the character thereof, the person manufactures, sells, transports, places or possesses, or conducts or negotiates a transaction affecting or designed to affect ownership, custody or use of:
(3) It is a defense to a charge of possession of a gambling device if the slot machine or gambling device that caused the charge to be brought was manufactured:
(b) More than 25 years before the date on which the charge was brought and:
[1971 c.743 §269; 1977 c.264 §1; 1983 c.403 §1; 1993 c.781 §1; 1995 c.577 §1]