This is a nice clean double parallel caliper with an adjustable trueing feature, marked "WATCH-CRAFT MANUFACTURED BY C. & E. MARSHALL CO.". It is complete, and in very good used condition. It measures 3.6" long and the pin size is .05 on both pins at one end, and .08" diameter on both pins at the other end. The polished finish is in very good condition, just a few minor dings here and there. A very nice watch maker or repair tool overall!