This particular relay type was the subject of a NASA contractor report in 1968, it is a hermetic sealed 28V DPDT type S2GP-7.25-73A. It was made by General Electric and is about 0.794" x 0.395" x 0.395". These were made in 1965 and also have the marking of RADIFLO (indicating they passed the KRYPTON 85 leak detector test). The NASA Technical Report is NAS 8-20109 if you care to read it. New Old Stock.
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