ref.1485
Square, Water proof

A very fine and very rare stailess steel manual winding square water-proof wristwatch ref.1485.
With Patek Philippe Extract from the Archives confirming production of this watch with silvered dial and applied steel numerals in 1943 and its subsequent sale on June 14th, 1944.

Launched in 1940, ref.1485 was to our knowledge, only created in stainless steel. The case was designed in the attempt to render it water-resistant by using the sliding sides. In short this was a very innovative design with an inner case compartment with gaskets being pressed together with the metal sliders on the sides of the outer case. The patent for this new case was registered on 25th August 1938 as Swiss patent CH 207378, and published 31st October 1939.