Builder, as usual, Miller is providing good information. I would guess 75 cm originally. The 3-ring Krupp barrel markings on this gun are really quaint; not many of those old markings are seen and they are similar to the Excelsior steel markings seen on Lindner Dalys. Old Sauer sidelock guns commonly had these cocking indicators that got smaller as time passed. Shooters were really nervous about the "new" hammerless gun craze and wanted to see mini hammers on the side to tell if the gun was really cocked or not. Crystal indicators are another manifestation of this same desire.
Good shooting.
C. K.
