Section 18 Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; clocks and watches; musical instruments; parts and accessories thereof 90 Optical, photographic, cinematographic, measuring, checking, precision, me Thereof. 90 15 Surveying (including photogrammetrical surveying), hydrographic, oceanographic, hydrological, meteorological or geophysical instruments and appliances, excluding compasses; rangefinders Commodity Code Description 90 15 10 - Rangefinders 90 15 20 - Theodolites and tachymeters (tacheometers) 90 15 30 - Levels 90 15 40 - Photogrammetrical surveying instruments and appliances 90 15 80 - Other instruments and appliances 90 15 90 - Parts and accessories