Longines Ultra-Chron

From Chronopedia
Longines ultrachron.jpg

Longines Ultra-Chron

Released in 1967, one year after the Gyromatic, the Ultra-Chron’s special lubricant—molybdenum bi-sulphide—solved the friction issue that plagued the early hi-beat movements. Advertisements touted the Ultra-Chron’s accuracy to “within a minute a month.”

Reference 7970-5, was released in the late 1960s. The hi-beat Calibre 461 movement is housed in a cushion case surmounted with a Bakelite bezel in vibrant orange and black. Though rare, the Reference 7970-5 is not as rare as the manufacture’s other vintage diver—the SuperCompressor, Reference 7150-1

Features

  • Case Diameter: 41mm
  • Case Height: 12 mm
  • Case length: 42 mm
  • Lug Width: 22 mm
  • Movement: Longines 431 automatic,25j, 36.000 bph, 39 hr power reserve,
  • Case material: Stainless steel
  • Crown: Non-screw down
  • Bezel: Uni-directional indexed w/ 60
  • clicks
  • Water resistance: Not rated
  • Vintage: '60s

Links

Credit - http://scubawatch.org/longines_ultrachron.html