I think I have a sibling to this. Others will know better, but I suspect that unmarked brass/wood bevels like this, like surgical instruments of the same period, are not easy to date other than with a fairly wide span (1865-1910?). Mine was handed to me by a fellow thrifter who was looking for a good home for it. In exchange, I made him a bonsai wire-threading needle out of an old dental tool handle and a no. 2 aluminum knitting needle. It is a little known fact that no. 2 (U.S. standard) knitting needles are almost perfectly sized to take a no. 4 machine-screw thread (in this case 4-48 NF).
