There is a long running thread at the top of the page here where members will look up Smith & Wesson S/N's for you, but they need the number. There is a similar one on The High Road. Also both Smith & Wesson forums are good about helping with that information. But as far as I know there is no website with that information for "look it up yourself."
A phone call to the factory will get you the year also, but if you want to know a specific date, it takes a factory letter. Cost is $50.00 and there is a couple of months wait time at least.
A phone call to the factory will get you the year also, but if you want to know a specific date, it takes a factory letter. Cost is $50.00 and there is a couple of months wait time at least.