Category: Sphygmomanometer
Estimated Date: 1923
Name: Princo Sphygmomanometer
Manufacturer: Precision Thermometer and Instrument Co.

Description: Wooden box 15×4.5×3. Type C, No.1033 , Pat Nov 4, 1913 and Aug 7, 1923. Hinged lid lifts to reveal manometer mounted on a wooden back. This version is very close to Baum. Ivorine scale to 300 mm Hg. Metal reservoir and glass manometer. Scale states that it is compensated mm.

Reference 1: 259