Estimated Date: 1900
Name: Von Basch Sphymomanometer
Description: 2” x 1.5” diameter lacquered brass anaeroid device. Numbers on dial to 22. Valve attached. There is a spring attachment on a 1” dia x 1/2” metal cup and the sensor is connected to the manometer by a missing rubber tube. The dial is labeled Basch sphygmomanometer #407 and the patent #DNP 38529 is also shown. Contained in a blue silk lined leatherette box with oval ends.
Reference 1: 139