Gagaryn The knurled knob is eccentric to the through bolt. The bright part looks like it has a sharpened face. It looks almost like some kind of lathe tool holder - albeit quite an agricultural one.
Gagaryn Close but no cigar. Hmm, some kind of architrave scriber or chamfering thingamajig? Definitely something for cutting or carving.
Elcarajillo Gagaryn No it is a bit ‘ agricultural’ for tha Pompeyexile Fine cutting yes, ammunition/ guns -no
Pompeyexile I always imagine watchmaker’s stuff to be a bit more… delicate? So, definitely for cutting with fine incriments if the thread is anything to go by. Nothing to do with weapon or ammunition making is it?