I don't think the numbers can be an employee's ID number because there are too many different numbers envolved. And I don't think they had that many people assembling the barrels. I can't figure out any dating system by the letters, either. Two of my guns don't have any letters at all- only numbers. One of my guns has 67E. I thought if you started at 1929 or 1930 and went down through the alphabet, this would make it the fourth or fifth year, which would figure with the serial number 2560. One I have has 123 only (with no letter)which could be the first year if they didn't put a letter on it. Or for the first few years- which would figure because the serial number is 93. The one I have #19754 was made in 1947 so an S could figure 1947 if you went down through the letters. You guys will have to check your letters with the serial numbers to see if they match up with the date they were made if you have the paperwork to be sure. They put them on there for some reason....?? I'll see if I can find out.
