Martin Anton Bascaran (MAB) Velodog
This is a very rare velodog made to the highst standards. A similar gun is held in the British and Spanish war museum.
Bascaron appears to be from Spain however this gun has leige proof marks. The MAB trademark is distinct to Spain.
Either way this is a fascinating gun. What appears to be a hammer is actually the release for the tip open style loading. the folding trigger is typical of the velodogs and puppies on the 1900's.
The gun is marked welsmith