Hi, my great-grandfather had a few guns he carried in the Alaskan gold rush. Two of them are S&W revolvers, but I'm not entirely sure about this one. I've done a little research, and it looks like it's a Clement 25 caliber or 5mm, not sure if those are exactly the same gun or not. There doesn't seem to be much information on this gun, though, and what I have found is often conflicting. It looks like it's still in good condition, but the trigger doesn't spring back so it needs some replacement parts. It's also a little stiff. I assume that the only way to field-strip it is to remove the two screws at the top of the back, but I haven't taken it apart yet. Any idea what exactly it is/ if it can still be used/ what it's worth? Thank you.