Apollo CM Block II Dual Indicator Meter. Designed to measure pressure in the two Service Module (SM) cryogenic oxygen tanks. Measurement range is from 100 to 1050 PSIA. The meter is from the CM ground trainer used by all Apollo astronauts located at the NASA center in Houston, Texas. Approximately 4 inches high x 1.5-inches wide x 5 inches deep. With Weston part and serial number stamps and a red ID label that reads in part: "For Use On Ground Instrument Trainer Only, Part No. 690708, Serial No. 10. LINK Div., General Precision, Inc." Weston for Link and NASA/MSC, nd
