No other part numbers with same form, fit, and function found.
A sound making device used on a buoy (as modified).
NSN 5998-01-120-8689
NSN 5835-00-174-7763
NSN 5985-00-405-2436
NSN 5930-01-280-9201
NSN 4140-00-372-2947
NSN 7035-00-329-4015
NSN 6650-00-604-1214
NSN 5895-01-450-2767
NSN 6110-01-422-4520
NSN 5960-00-491-8941
NSN 6240-01-303-6174
NSN 5998-01-114-2010