MIL MIL-R-5757/29D

RELAYS, ELECTRICAL, 1 PST TO 4 PDT CONTACTS LOW-LEVEL TO 1/2 AMPERE (DRY REED) (SUPERSEDING MIL-R-5757/29C) (SEE BASE FOR INACTIVATION NOTICE) (S/S BY MIL-R-5757/29E)
standard by Military Specifications and Standards, 07/22/1985