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.
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