Test unit of a control panel meter for the Space Shuttle. Meter measures 1.75 x 4 x 5.25 and has two readouts calibrated from 0-115%. Metal Rockwell label affixed to the back reads, in part: “Meter, Tape…Serno. 004, Date of Mfr. 11-81.” One side of the housing is marked, “Eng. Test Unit.” In fine condition. RR Auction COA.