A Longines Ultra-Chron gentlemans' vintage automatic calendar watch from 1968 in original un-restored condition. The Ultra-Chron was introduced by Longines in 1967 to mark the 100th anniversary of the company. It was also a time when supremely accurate quartz watches were threatening the market for mechanical watches. So the Ultra Chron was designed as a high beat mechanism to keep time with great accuracy. It operates at 36,000 beats per hour, twice the speed of most mechanical watches produced at the time. These models are rarely seen and always attract considerable interest among collectors, particularly one in original unmolested condition. The case and factory original dial present well and the automatic movement is running and keeping time with the calendar function operating correctly. It is signed on the case, dial and movement.
Dial: factory original, signed "Longines Automatic Ultra-Chron Swiss". The hours are marked by gold coloured batons . The hands are in good shape and the crystal is clean and clear. The dial is showing light patina.
Case: 10K gold filled, in good condition, measuring approximately 40 mm from lug to lug and 35 mm across, excluding the un-signed crown. The case is signed "Longines" on the inside and is hallmarked as 10K gold filled. It shows the inevitable signs of responsible use over the years but no signs of abuse. All that I could see to draw to your attention is a not obvious pressure indent on the back of the case which I could not pick up in the photos and neither detracts from the overall appearance of the watch nor interferes with is functionality.
Movement: crisp and clean Longines signed high grade, high beat cal. 431 automatic movement with 17 jewels. The serial number, dates the watch to 1968. It is running and keeping time. Please also look at the lettering on the rotor. A heavily used watch would have resulted in wear causing the rotor to tilt a little causing wear and partial removal of the lettering. The condition of this movement shows clearly that it has received only moderate use over the last fifty years.
Strap: fitted with a new generic brown leather strap which fitted to the watch, the strap measures approximately 211 mm from buckle end to the last hole.