R-1521-b to be stamped or stenciled on lens per dwg b-11950-1
NSN 6150-00-827-0081
NSN 5905-01-152-6166
NSN 6105-01-415-2339
NSN 5996-01-088-7074
NSN 5996-00-917-4785
NSN 6130-01-650-4449
NSN 5965-00-246-5612
NSN 5835-01-312-4446
NSN 5920-00-135-0127
NSN 5835-01-416-6455
NSN 5960-01-495-0859
NSN 6685-01-646-0047
Last Updated: 05/04/2024