Two glycol evaporator control electronics modules for the Apollo Command Module Environmental Control System (ECS), mounted together in a 16.5″ x 8.25″ x 2″ frame. The affixed Honeywell tags read, "Control, Temperature, Glycol Evaporator…Order No. 019-76012-8, NASA Order No. NAS 9-150," with serial numbers of "10028BAB1004" and "10028BAB1005." In overall very good to fine condition, with the tip of one 'ear' on the mounting frame broken off.
Terms and abbreviations used in our descriptions.