Azimuth circle prism testing thread

Azimuth circle prism testing thread with two weights.

ID:	ACO1114.4
Type:	Azimuth circle prism testing thread
Display location:	Not on display
Credit:	National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Measurements:	One weight: Diameter: 4 mm;Overall: 44 mm
Parts:	Azimuth Circle Azimuth circle part (ACO1114.1) Azimuth circle part (ACO1114.2) Azimuth circle part (ACO1114.3) Azimuth circle prism testing thread (ACO1114.4) Azimuth circle box (ACO1114.5)

Object Details