Hello WildCattle,

Thank you for that info.

I'll stick withe the wider range of 1895 - 1909, based on:

"Bore diameter in millimeters. Until 1894, stamped in .02mm graduations, then in 0.1mm steps"

"Jansen was at this address only until 1908/1909"

Any suggestions as to what the "184" and "LJ" and "LL" stamps could mean?