MIL-W-22176A, MILITARY SPECIFICATION: WATCH, WRIST, SUBMERSIBLE (400-FOOT), NON-MAGNETIC (24 MAR 1961) [NO S/S DOCUMENT]

MIL-W-22176A, MILITARY SPECIFICATION: WATCH, WRIST, SUBMERSIBLE (400-FOOT), NON-MAGNETIC (24 MAR 1961) [NO S/S DOCUMENT]., This specification covers submersible wrist watches with nonmagnetic features, suitable for use by swimmers and divers and having a 30 seconds daily rate accuracy or better.