You are viewing a very hard to find Swiss 900 silver open face doctor's pulsimetric pocket watch made around 1900. The case measures 2" in diameter; and, is marked 0.900 and has the Swiss bear hallmark. The pulsimetric scale of the dial is graduated to indicate the rate of respiration or pulse of a patient. The user can take a pulse or observe a certain number of respirations per minute. The watch was made by the firm Perret & Fils, Brenet. The 15 jewel complicated movement is numbered:23075 as well as the case and covers. There is a small chip on the porcelain dial which can not be seen when the outer cover is down. In fine working condition. The watch is pin set and stem wound. The watch winds, sets runs, keeps time and pulse and respirations.
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