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OHPF Longines Ultra-Chron from 1972 on lovely original Bracelet

  1. pnwyankee Jul 17, 2021

    Longines Ultra-Chron on beautiful and original Longines Bracelet

    History of the 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.”

    The Ultra-Chron was built to celebrate Longines’ centenary. With Girard-Perregaux’s Gyromatic debuting a year before and Seiko’s Lord Marvel around the same time, the Ultra-Chron was one of the earliest watches to operate at 36,000 bph at a time when the standard was just half that. When it debuted, Longines claimed in its advertisements that the Ultra-Chron was “the world’s most accurate watch,” and was guaranteed accurate to within a minute per month (or about two seconds per day).

    A number of movements were used in the Ultra-Chron over the nine years of production. These included the Cal. 430 (centre seconds), Cal. 431 (centre seconds with date), Cal. 432 (hours and minutes only), Cal. 433 (date only) and some interesting manual wind movements which featured a hacking second hand which would stop when it reached the 12 mark (the Cal. 6952 with date and Cal. 6972 with day and date). The later Cal. 6651 and Cal 6652 models beat at a slower 28,800vph, but also had “Ultra-Chron” on the dial.

    The watch has just been serviced on the 23rd of October 2020, and is of course very accurate.
    The condition is excellent, the case, the dial, hands and indexes, the movement and the Longines Milanese bracelet are all original in mint condition.
    The watch comes with the Service Receipt from the Watchmaker in Paris.

    Diameter without the crown 35,5mm, 39mm lug to lug, 10,5mm thick, and a very nice presence on the wrist.
    25 jewels Automatic Cal Longines 6651, date and central second complication, Just serviced and very Accurate
    Flawless original Silver Dial, T Swiss Made T marked
    C Shape case with Brushed and Polished sides, Screw Down caseback
    Stamped Crown “Longines” + Eagle
    Domed Acrylic Crystal in great conditon, with a few light scratches (almost unnoticeable)
    Original numbered Longines Milanese bracelet adjustable for every size wrist, in very good condition

    I am asking $1,095, plus $20 for continental US shipping.
    Will ship to other locations if the buyer is willing to pay the additional costs over $20.
    Omega Forum Private Watch Sales references:[node]=10
    My eBay feedback is 475 feedback ratings: 100% positive

    Thanks OF for the space.


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    joeciuffo, Syrte, Tony C. and 18 others like this.
  2. Zdzislaw Jul 18, 2021

    Very nice! GLWS! ;)