I thought you said it was stamped EB???
Interesting this gun was made in 1933 but it wasn't send out of the factory until 1936, the last years they didn't make a lot but usually the serial list and barrel codes line up at least within a year. This gun was within the last 500 or 600 ever made...
Serial no lists do exist
A 12C in like new condition can bring between 1,200-1,500.-
The other model is the 12cs it's the only one that is different ammo it is 22 remington special aka WMR.
The Engraved models are E,D,F which F being the highest level of engraving and wood. Engraved models can bring substantial sums!