California Code, Penal Code - PEN § 330.7

(a) It shall be a defense to any prosecution under this chapter relating to slot machines, as defined in subdivision (d) of Section 330b, if the defendant shows that the slot machine is an antique slot machine and was not operated for gambling purposes while in the defendant's possession. For the purposes of this section, the term “antique slot machine” means a slot machine that is over 25 years of age.

(b) Notwithstanding Section 335a, whenever the defense provided by subdivision (a) is offered, no slot machine seized from a defendant shall be destroyed or otherwise altered until after a final court determination that the defense is not applicable. If the defense is applicable, the machine shall be returned pursuant to provisions of law providing for the return of property.

(c) It is the purpose of this section to protect the collection and restoration of antique slot machines not presently utilized for gambling purposes because of their aesthetic interest and importance in California history.