Half Plate
A half-plate watch, as its name implies, is one in which the top-plate covers half of the pillar or lower plate, and which supports the upper ends of the barrel arbor, center and third pinions.
How to true a balance, repair a chipped dial, temper a spring or test a stone — the working bench-book of the American watch trade, arranged A to Z.
A half-plate watch, as its name implies, is one in which the top-plate covers half of the pillar or lower plate, and which supports the upper ends of the barrel arbor, center and third pinions.