= In very good condition. The Sphygmomanometer measures the blood pressure by affecting the height of a column of mercury. Manual sphygmomanometer like these are considered as the "gold standard" because of their accuracy. HAKO. Oscillometer 559. Sphygmomanometer, n.pl. (Germany), early 20th cent., orig. fitted velvet-lined case, 17,5x22x9 cm.
- Glass plate in oscillometer w. 1 scratch. Case sl. rubbed.