Hi folks, I have a line on a Model 41 with a 7 3/8 inch barrel which is in very nice shape. I am trying to figure out it's age and based on the fact it has a indicator on the end of the slide I am thinking it is from the 60's. The serial number is 13xxx. I know from talking to customer service at Smith they started using an "A" prefix in the serial numbers starting in 1970. The model started in 1954 with SN001 and the ending SN before alpha characters were introduced was 115000. I was wondering if anyone had an idea of how many 41's were produced each year. If I knew that I could estimate the year of mfg for the gun I hope to buy. Any insight would be appreciated.