MIL-F-21241 (NOTICE 2), MILITARY SPECIFICATION: FILTERS, COLOR FINISHED (FOR OPTICAL INSTRUMENTS) (01 MAY 1985) [NO S/S DOCUMENT]

MIL-F-21241 (NOTICE 2), MILITARY SPECIFICATION: FILTERS, COLOR FINISHED (FOR OPTICAL INSTRUMENTS) (01 MAY 1985) [NO S/S DOCUMENT]., Military specification MIL-F-21241 (NOrd ), dated 4 December 1958, is hereby reinstated and may be use for procurement.