I have seen one once, friends dad had one, but finding ammo was impossible (now with the internet, there appears to be plenty). I seem to remember it being a copy of a Colt 1906 vest pocket pistol, had some issues with the ammo (light primer strikes). The condition that it's in is going to make it 0% reliable, so you might want to look into a severe cleaning as it has lost almost all collectors value from the pitting.