Bell signal; mechanical telegraph
NSN 6145-01-434-3437
NSN 6220-01-571-7526
NSN 6105-01-183-4815
NSN 5950-01-377-7171
NSN 5945-01-414-2383
NSN 6130-00-984-4285
NSN 6320-01-516-3836
NSN 5975-01-358-3715
NSN 5855-01-584-1365
NSN 5950-00-126-2995
NSN 5920-01-327-2572
NSN 5965-01-458-2412
Last Updated: 06/29/2025