HEUER-LEONIDAS ref. 403.229 – pulsation and respiration
- start, stop and reset to zero by consecutive depression of the crown
Recorder and register
- 0-30 seconds register
- 7 jewels
- unbreakable mainspring
53 mm without crown
- The dial has two scales to help to measure repiration (number of breath cycles per minute) and pulsation (number of pulsations per minute). It should be mainly used by doctors and medical staff. For pulsation, 10 pulsations are timed and pulsations/minute is read on the black outside scale. For respiration, 5 breath cycles are timed and number of breath cycles/minute is read on the inner red scale.
- The stopwatch was sold in France. S.A.V.I.C is printed on the box and, a french adress is stamped in the box.
Feel free to share suggestions or improvements for this article using this form.