pump remington model 12 serial number chart

I'm wondering when it was made, what length shell it would have been originally chambered for (I'll take it to a 'smith before shooting it) and anything else people can tell me. The forearm is checked (rather than ribbed as in most pictures I have seen.) I'm not sure if it was once blued and has totally worn or if it was stripped or if it is some ancient stainless or what (but it now has an almost nickel-like patina.) I believe it is a 27-inch barrel and I think the stock and forearm are walnut. The slide-lock on the left side is stamped: On the tail of the trigger-strap is stamped the round 'Remington UMC' trademark. On the underside of the receiver is stamped: On the right side of the barrel but inverted is stamped: My first reading was that this meant it was made in May of 1934 ('K' & 'C') and repaired by Remington in October of 1952 ('E' & 'YY') but the Model 10 stopped production in 1929. On the left side of the barrel, it is stamped: Introduction Year: 1952 Year Discontinued: 1981 Total Production: Approximately: 1.03 million Designer/Inventor: L.R. (Of course, there is more on that line but it is worn away.) Description: Slide action, high-power hunting rifle with detachable magazine which replaced the Remington Model 141 and was later replaced by the Remington Model 7600. REMINGTON ARMS-UNION METALLIC CARTIDGE CO. Still on the top of the barrel but to the right of that, and in smaller type, is stamped: Hoping somone here will chuckle at my ignorance and take mercy on me!

I knew nothing about it before coming here and have learned a good bit but I still have question.

I recently inherited a Model 10-A from my father.

Pump remington model 12 serial number chart