MIL-C-38207A, MILITARY SPECIFICATION: CLOCK AIRCRAFT, MECHANICAL ABU-11/A (08 FEB 1965)

MIL-C-38207A, MILITARY SPECIFICATION: CLOCK AIRCRAFT, MECHANICAL ABU-11/A (08 FEB 1965)., This specification covers an integrally lighted mechanical aircraft clock with a 1-hour elapsed time capability, designated ABU-11/A.