Company item name--test set, standby s1
No other part numbers with same form, fit, and function found.
NSN 6150-01-383-2213
NSN 5950-01-013-4546
NSN 5905-01-088-8068
NSN 4140-00-495-8704
NSN 6650-01-092-2451
NSN 2925-01-049-8906
NSN 5985-01-398-2177
NSN 6240-01-068-3491
NSN 5855-00-198-3197
NSN 5945-01-191-4288
NSN 6610-01-287-9814
NSN 6150-01-427-3764