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 4140-00-990-3311
NSN 5999-01-454-3708
NSN 6240-01-290-5165
NSN 5975-00-771-6691
NSN 5996-01-500-7871
NSN 2925-01-525-8212
NSN 6650-01-231-2082
NSN 6645-00-796-7206
NSN 6130-01-160-8037
NSN 5920-00-988-0869
NSN 5965-00-314-5303
NSN 6150-01-448-8899