Here's a video of the little popper popping. Followed by a link to the blog post on the project.

https://www.youtube.com/watch?v=_P4QWg83fWg

https://blogostuff.blogspot.com/2019/09/shooting-smith-wesson-no-1-12-revoler.html

Looks like fun!

Otony says they have one in decent shape in the shop where he works...

I've got a .38 S&W "Baby Russian" in about the same condition. It belonged to my wife's late father. Darned old thing shoots just fine (with the wimpy factory ammo of course) and slips in a hip pocket nicely in its homemade holster.