RELIQUARIES for OBJECTS THAT MEASURE
Watch or clock balance adjustment calipers, often called balance truing calipers, are precision tools used by watchmakers to hold the balance wheel by its pivots, allowing for the correction of "flatness" and "roundness" (truing).
Watch Balance Wheel Calipers
Antique watch calibers, masonite, antique print, paint
32 3/8" x 18 1/8" x 2 9/16"