Antique 6 Inch Bone and Silver Ruler with Caliper stoneware funnel I would guess German Black

I would guess German Black Forest but could be an American interpretation of the same(

with these fantastic fat dovetailed corners

Old man measures 15 1/4" long

There are just few bristles missing (one hole's worth)

Antique 6 Inch Bone and Silver Ruler with Caliper stoneware funnel I would guess German BlackStanley and a few other tool makers produced beautiful bone rulers, which bear their marks, but I've looked and looked and not found another like this one. There are no readable measures on the bone, but on the both sides of the silver end on are marks for 4 and 5 inches, and then the caliper pulls out to measure 2 inches, with each inch divided into 32nds on the flip side. Probably more of a beautiful thing than a super useful tool these days, but