Bell signal; mechanical telegraph
NSN 6220-00-010-5359
NSN 6130-00-166-7934
NSN 5960-00-888-7218
NSN 5905-00-584-3708
NSN 5895-00-442-5044
NSN 6220-00-494-7228
NSN 5975-01-120-8615
NSN 5910-01-191-9837
NSN 5996-00-137-9142
NSN 5835-01-303-6563
NSN 6110-01-048-2414
NSN 6220-00-056-8827
Last Updated: 06/08/2025