Tonometer (sphygmomanometer) with aneroid manometer, tubing, bellows and arm-cuff in brown plastic case, type invented by Dr. H. Von Recklinghausen, German, 1920-1940 Tonometer (sphygmomanometer) with aneroid manometer
Sphygmomanometer by Surgical Instrument Co., in case, English Sphygmomanometer by Surgical Instrument Co.
Recklinghausen's sphygmomanometer by Bosch and Speidel, in case, c1900, German Recklinghausen's sphygmomanometer by Bosch and Speidel 1896-1905