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 12 Clock cases and cases for other goods of this chapter, and parts thereof 91 12 90 Parts of clock cases and cases for other goods of chapter 91 91 12 90 00 Parts of clock cases and cases for other goods of chapter 91 Commodity Code Description 91 12 90 00 00 Parts of clock cases and cases for other goods of chapter 91
