Okla. Stat. tit. 21, § 21-1588: Postage stamps, forging

Every person who forges, counterfeits or alters any postage or

revenue stamp of the United States, or who sells or offers to keep

for sale, as genuine or as forged, any such stamp, knowing it to be

forged, counterfeited or falsely altered, is guilty of forgery in

the second degree, a Class D1 felony offense.