IIRC the serial requirements of the 1968 Act were primarily for cartridge weapons, black powder guns whether original or reproduction were not even classed as firearms at that time (still aren't under Federal law, some states treat them as such though). Country of Origin was required on many imported products (not just guns) for many years though. Many older black powder imports have only the mandatory proof marks and some don't even have that as they were sold as kits (I.E. sold as parts, not a completed gun) though that changed over time (and probably liability concerns). ASM made a lot of the less common reproduction models at that time including the Colt Pockets and Dragoons. I would suspect that they are the most likely maker of a 1969 dated Pocket. I don't believe Uberti offered one until later in the 1970's and don't recall Pietta offering one at all (though they did offer the Remington pocket starting in the 70's). Some ASM parts are still available from various online sellers.