Section 18 Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; clocks and watches; musical instruments; parts and accessories thereof 91 Clocks and watches and parts thereof 91 10 Complete (unassembled), incomplete and rough watch or clock movements 91 10 12 Incomplete movements, assembled Commodity Code Description 91 10 12 00 Incomplete movements, assembled
