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
Recklinghausen's sphygmomanometer by Bosch and Speidel, in case, c1900, German Recklinghausen's sphygmomanometer by Bosch and Speidel 1896-1905
Sphygmomanometer by Surgical Instrument Co., in case, English Sphygmomanometer by Surgical Instrument Co.