Vintage
Longines Ultra-Chron Diver (1968) 7970
Collector's Corner
The long and rich history of Longines is written into each of the brand’s design. Each piece produced over the years is part of the Swiss watchmaker identity, a historical legacy that Longines has always strived to preserve and highlight.
Information & Conditions
Type Of Watch
Diver’s wristwatch equipped with a very accurate high-frequency movement, featuring a rotating, unidirectional bezel.
Serial Number
15’385’823
Condition
Overall excellent, attractive condition, refreshed original dial.
Serviced and revised by Longines Heritage workshop.Date Of Product
1968
Date Of Sale
14. August 1972
Documents
Certificate of authenticity by Longines
Case
Dimension
Ø 41.00 mm
Case message
Stainless steel, two-body cushion case, originally waterproof up to 200m, Hesalite glass.
Material
Stainless steel
Dial & Hands
Dial
Black dial with luminous indexes, applied Ultra-Chron symbol black turning bezel with tritium filled numerals 15-30-45 and triangle; red minute-scale.
Hands Description
Hour and minute hands filled with tritium, red minute hand.
Dial color
Black
Movement & Functions
Movement Type
Automatic
Caliber
431 high-frequency
Functions
Hours, minutes, seconds, calendar date. Rotating bezel.
Movement Description
Mechanical movement with automatic winding, calibre 431,5 bridges, balance spring beating at 36,000 bph, 17 jewels.
Strap
Material
Leather strap
Size
22mm width
What makes this timepiece exceptional
With its cushion-shaped case and fluid lines, this chronograph has been designed for divers and timekeepers. Its oversized case allows you to easily read the graduated bezel as well as the large tenths of a second and minute counter. Covered with solid mineral glass, the case can withstand a pressure of 20 bars, allowing the diver to descend to a depth of 200 meters. This chronograph bracelet patented by Longines is also equipped with a second hand with a graduated "Vernier" scale at its tip, for quick and precise reading to the nearest tenth of a second. The chronograph movement manufactured by Longines also includes a flyback mechanism.
About restoration
Restoration by Longines is made up of more than ten meticulous steps calling on all the qualities of our experts. From diagnosis to testing, discover more about Longines workshop services.
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