1950s Paul Portinoux Val-22 Stainless Steel Water-resistant Rare Medical Chronograph

This is a "PAUL PORTINOUX" ss water proof medical chronograph made in 1950s. Based on the famous Cal.22 made by Valjoux, which supplied machines to many brands as a chronograph maker, this model is equipped with a one-push chronograph that has been improved specifically for medical profession, including pulse meter (pulse) and respiration (respiration) functions. The dial design is colorful and color-coded 150-100 (red), 85-60 (black) and 55-45 (green). The original windshield has a magnifying lens to make it easier to distinguish between 150-45, and the structure that protrudes greatly from the massive screw back waterproof case has a sense of presence. It is a precious gem that attracted a unique expression not only in functionality but also in design.