This is a nice clean double parallel caliper with an adjustable trueing feature, marked "LEVIN". It is in very good used condition, but appears to have a small part of the cross plate truing device missing (not sure, but there is a very small tapped hole in the adjustable plate that has nothing attached to it). It measures 3.5" long and the pin size is .075 on both pins at one end, and .095" diameter on both pins at the other end. The polished finish is in very good condition, very little wear. A very nice watch maker or repair tool overall!