Revolver 5mm
It's very, very little!!
Revolver 5mm (see also in the heading "Belgium")
They are both of the "revolvers of transition". With the origin, they was revolvers with pin, probably unsold goods and transformed into workshop out of revolvers with central percussion towards the end of last century, when the pin revolvers did not find really any more purchasers. That meets from time to time, and some have even a Abadie lever as on Bulldog.
Interesting to collect!
The fixing of the door is artisan. The punch U surmounted by 2 crowns is quite simply the German punch of test of the bench of tests of Bremen (and not of Ulm). U means "Untersucht" (examined). Probably manufactured in Liege with a gun too long and finished and tested in Germany. Impossible to say where it was converted, but probably not in Liege. I am unaware of on the other hand what letters BN mean on the carcass.
I think that they were converted in the same workshop, because they have identical ejectors and transformed Lefaucheux hammers. Conversions of the same type made in Liege generally comprise a lever of added bounce, the top of the carcass receive an added part and are bored of a channel of central percussion, the hammer, the ejector and the cylinder is replaced by the new ones. Here, only the cylinder and the ejector were changed, and there is no lever of bounce. The head of the hammers was simply transformed. They are unfortunately not nickelled, but chrome, and this bad practice of beginning of the century is bad bus chromium plating is badly made and does not hold well. But it is perfectly in the style of the time.
Marcel