JAN-C-1196, NATIONAL MILITARY ESTABLISHMENT SPECIFICATION: CHRONOMETER'S, SHIPS' (30 JUN 1949) [NO S/S DOCUMENT]
JAN-C-1196, NATIONAL MILITARY ESTABLISHMENT SPECIFICATION: CHRONOMETER'S, SHIPS' (30 JUN 1949) [NO S/S DOCUMENT]., This specification consists of this cover sheet and Navy Department Specification 18C7C dated February 1931 attached hereto, without modification,