Ref. 1485 "étanche" and Ref. 1486 "étanche à cornes capuchonnées". Production of these references started in 1940. Both models have special sliding lateral bars to keep the watch resistant to humidity and dust; reference 1486 has hooded lugs. A watch ref. 1485 with cylindrical lugs is published in "Patek Philippe Wristwatches" by Martin Huber & Alan Banbery 1998 Edition p. 151. A watch ref. 1486 with a "polychrome cloisonné" enamel dial is published in the same book p. 152.