I've had a problem dating the year of mine.....I found a couple of sights, but nothing that matched my letters/numbers. I've called S&W but was on hold so long I gave up, numerous times. Someone out here has to have some good intel on this, as far as where to go........
Stop by any business that buys or trades in guns...Most have books that they can look up the year by serial number...Don't go by the price/value shown since most have increased since whatever book they are using was published...Even the 2016s are a little off just due to desirability and inflation...