Somewhere I've seen a list of serial numbers. If it exists, it must have come from Roy at one point or another. I've got one with a 682,000s and another up in the 692,000s. The gun I've got in the middle is an M&P target. Look at the top of the page and you'll see my gun. Except the caliber is different. Mine even has the HBH, a very rare option on K frame center fires. But I'd trade Dave for his!