Dating rolex watch
On watches manufactured at the Dundee, UK, factory, there may be an inked stamp inside the caseback consisting of one letter and one number.
Founded by Hans Wilsdorf in 1905, Rolex have always been a manufacturer of firsts; first wristwatch to receive Chronometer certification, first with automatically changing date, first with an oscillating winding rotor as is still used today and the first waterproof wristwatch too.
For example, a case stamped with the number "2106" would indicate that the watch was made in the 21st. Likewise, a bracelet stamped with the number "4807" indicates that the bracelet was manufactured in the 48th. Source: It is believed (although no one seems to be completely sure) that Citizen used a similar serial number dating system to that employed by Seiko (see below).
So, you need prior knowledge of the decade in which the watch was manufactured before you can date it accurately with the serial number.Airman 1 with Felsa 692 "Bidynator" 23-jewel: 1953-1960 Airman 1 with A. Schild 1701 17-jewel: 1960-1967 Airman 1 and SST with A.Schild 1903 25-jewel: 1967-1971 Airman 1 and SST with A.Can any other manufacturer boast this much provenance?
I can at least say thanks to Agent Orange, Jo T, "mach 0.0013137", Mel and K. Serial numbers may be found on movements, case backs or dials depending on the make, model and age of the watch in question. Newer Breitling models (circa 2001 and beyond) may be dated via a number stamped on the case between the lower lugs.It's not unusual to find movements that are one or two years older than the cases containing them. Perhaps less reliably, stamps on bracelets (circa 1995 and beyond) provide a manufacturing date in the same way.