Interesting gun, the S&W 625. There never was a no dash, nor was there a -1. The first production 625 is the -2, and as SubGunFan noted, there are 2 versions of the -2. Mine is a Model of 1988, and it's the best shooter of all my revolvers. I've owned a number of 625's through the years, but the 1988 is the only one I still have. I kinda like it, Belgian proof marks and all!
It's confusing, and as near as I can tell, the Truth Isn't Out There.Both of mine are 625-2 guns. I just did a little Googling on the Model of 1988 and found out there was a run of only 1500 that was to honor the IPSC shooting sport. After that S&W made the Model of 1989 for general market. The one thing I don't like about both is the SN stamping next to cylinder. You can't (barely) read the number because of the POOR stampings. The SN at base of grip is clear to read. That is just plain piss poor workmanship.