thanks for providing good photos, on their basis, i'll start over;
the gun was not proofed for smokeless powers, the rule establishing the marking of barrel weights came into force on 6 june 1892, and at the same time chamber markings were required - shown as a fraction with chamber length over chamber diameter: example given is 70/20,6 (but with the 70 atop the 20,6 - that would be read as 70mm chambers over 20,6mm diameter just forward of the rim). so the gun was proofed no later than early june 1892, and i believe with standard (short) belgian chambers.
the 2 3/4 (inch) markings over the bore and choke measurements, i do not believe to be original to the gun - likely professionally applied when rechambered, but not done by francotte or the liege proofhouse. original bores were - 18.5mm, and both chokes were 17.7mm - .728 and .697 = 31 thou chokes.
not having supplied the serial number range it would be worthwhile to go to the bottom of each page here on DGSBBS - click on "other useful information" and then click on "high grade shotguns dates of production". the second line starts with francotte and goes back to 1887, that should give additional information to confirm or reject the information given here.
best regards
Last edited by graybeardtmm3; 08/16/26 04:00 PM.
