Longines “Ultra-Chron”

Swiss Watch Fair 1968 BF 44
The first diving watch with a high fraquency movement (36,000
vibrations per hour). The all-steel case is built to withstand a pressure of 20 atmospheres. Pawlod turning bezel. Noto the- Iltonneaul, caso lines : “super-sportst” watches also compete in tho world of fashion. (LONGINES “Ultra-Chron”)