A piece of transparent material specifically designed to be placed directly in front of a dial or scale to protect it from foreign matter. It is cut to size and may include a frame. It may have an index line or other marking. See also window, observation; and dial, scale.
Classification: Clock or watch glass; glasses for noncorrective spectagles not optically worked; hollow glass spheres and their segments for the mnfctr ofsuch glasses
NSN 5990-01-251-0234
NSN 5998-00-209-8030
NSN 5835-01-461-8184
NSN 5895-01-024-0528
NSN 5950-01-290-3967
NSN 5996-01-259-8909
NSN 5855-01-492-6385
NSN 5895-01-198-2228
NSN 5945-01-025-7276
NSN 5915-00-178-9864
NSN 6240-01-480-0892
NSN 6645-00-451-6462