Martin-type sphygmomanometer calibrated 40-300 mm Hg
1. Mayer-Meltzer, 59 Great Portland Street, London (estab. 1869, closed 1928)
2. De Vilbiss Manufacturing Company (estab. 1890, closed 1970)
C.J. Martin sphygmomanometer by Mayer & Meltzer. Consists of rubber lined, leather, fabric and canvas armband with rubber plug, glass and rubber tubing with metal screw valve, attached to blood pressure gauge mounted on a wooden stand and hinged to the black leatherette unstrument case, rubber ball pump, bolt and washer.
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De Vilbiss Manufacturing Company (estab. 1890, closed 1970) ▫ ball pump
scale/inscriptions ▫ gauge calibration lines etched in black and marked at 10-unit levels, '40' to '300'
inscriptions ▫ Medical Society of Victoria caption: 'A Mercury Reservoir and Capillary Tube Monometer Increases Sensitivity' ▫ missing
maker's mark ▫ moulded around central band of ball pump: 'DE VILBISS MFG. CO. TOLEDO, OHIO, U.S.A. #1'