Estimated Date: 1930
Description: 5“d x 2.5” lacquered brass housing with scale calibrated in inches and mmHg. Labeled as above and Tledo Technical Appliance Co, Toledo, Ohio for the Metabalor. Has a brass dial to show current setting, anaeroid mechanism is visible through circular opening in dial. Part of the basal metabolism instrument for regulating air pressure.
Reference 1: 417