With gun in hand, yes, ellenbr, it has a dolls-head extension.
Proofmarks include the typical circled 12, 12/1, crowns, Nitro, kruppstahl, etc., and the 8,7mm mark on the rifle barrel.
There is one other proof mark I don't understand. Next to the serial/assembly # on the rifle barrel there is:
2,4g G.B.P./St. m.G.
The outside dia. of the rifle chamber is .438 while the rim is .533. Rifle bores still come back all over the place as I guess sometimes I'm on a land and sometimes a groove.
Thanks to all who helped. The gun is in excellent shape and has light scroll engraving (50% coverage). Whoever built this gun were craftsman with few peers.
