The original owner of this Longines ultra-chron has sent it in to be repaired. He remembers getting it as a gift when he was 15 back in 1974! He has the choice of a Certina DS and this Longines. He was very into his model aircraft flying and the aviation fuel once leaked into the watch creating a very unique patina on the dial and hands. It’s not keeping time and needs a service. Certainly a unique Ultra-Chron!