If you get it, and if it is a matter of importance to you, the only sure way to determine the shipping date is to get a factory letter. During the Roosevelt Depression, the gap between manufacturing and shipping dates could be years. This is compounded by S&W's practice of not shipping in serial number order, so a very low serial number gun could possibly go out the door long after a higher numbered one. I have understood that there have been examples of revolver serial numbers in the low 600000 range, probably manufactured in the early 1930s, not shipping until 1940. It wasn't until the beginning of the British contract M&P revolver production in early 1940 that some of the old guns, frames, and other parts came out of factory inventory.