Antique Tools > Measuring Tools

Proportional Calipers for Accurate Thickness Measurements.

Item#: TOM436



Proportional Calipers or Degree Gauge. This delicate tool was used to measure the thicknes or diameter of various parts by watchmakers or jewllers. The legs and spring are made of steel with a brass dial. This caliper is capable of measuring within a range of 0-72 parts of half an inch and with an accuracy of 1/32 nds of an inch. (The maximum thickest this instrument can measure is half an inch) Overall length is 15 cm (6 inches).