My sister hid my dad's gun a few years ago when he started getting dementia and we just found it today. Daddy passed away in May of '17 at 94. It says Special CTG on the barrel, but I can't make out the number before that which is 38 or 58. I don't think a service revolver would be a .22 though. My wife did find some bullets the other day before we found the gun and put them up. I need to find them and see if they're .22s. I think also on the barrel I saw that it was patented at the beginning of the 1900s. Not sure if it's that old or not though. If it was a service revolver it could be my grandfather's from WWI. Anyway, I have no idea.
Anyway, I need help identifying this gun if you can help. I know it's a Smith and Wesson, and I'm pretty sure it's a .22 and am curious how old it is, etc. Here are a few pics: