Dating omega watches serial number
Longines timers are still used in many sporting events, especially equestrian and gymnastics competitions.
Longines produced some really beautiful sport chronograph watches in the 30's and 40's, using Longines own in-house movements.
During this period Rolex was also putting the date code on the inside of the case backs..confusing production serials can sometimes have their production date determined.
Look for the Roman number I, II, III or IV for the quarter & two arabic digits for the year.
Longines is also the official timer of the World Air Sports Federation, and has provided the timing equipment used to verify world aviation records, including Lindbergh's historic first non-stop solo crossing of the Atlantic.
Aviation pioneer Amelia Earhart was also known to have worn a Longines watch, which is described here.
Longines was the first company known to have created precision timers for sporting events.
Be sure to use the serial number on the movement (the works) of the watch. Renaissance Watch Repair is not affiliated with the Longines company.
Another advantage for the collector is that parts can usually be found to repair Longines watches.
At the time of this writing, Longines is part of the Swatch Group, the largest Swiss watch conglomerate.
In the 1850's, Agassiz passed control of his company to his nephew, Ernest Francillon.
Francillon wanted to modernize the production of watches and believed that bringing all the final assembly and finish operations together into one factory would be a more efficient method of production.
In the late 1950's, Rolex again reached the 999,999 production serial & they started their 7 digit numeric numbering system at 1,000,000 for production serials, this continued until the 1990's until production serials reached 9,999,999.