Mark and explanation
1st Row
- TC or CTC = Transport Canada
- 3ALM = Aluminum specification (Canada)
- 124 = Service pressure (bar)
- T11.3KG = Tare weight (Kilograms)
2nd Row
- DOT = US Department of Transportation
- 3AL = Aluminum specification (USA)
- 1800 = Service pressure (psi)
- U372530 = Serial number
- Luxfer or M#### = Manufacturing plant identifier
Hello, I can tell you that due to the low number production of watches by Jules Monard that were made when comparing them to companies like Patek, Elgin and Waltham that produced hundreds of thousands of time pieces has left your watch maker un-noted and and no known record was available that I know of that states the date look up on his watches by serial numbers. 21009 is a very low number. Check your Apple warranty status. Enter a serial number to review your eligibility for support and extended coverage.
3rd Row
- 01 = Month of manufacture
- A = Mark of independent inspector
- 98 = Year of manufacture
- 20#CO2 = CO2 capacity
- TW24.9 = Tare wight (lbs)
Cylindre Watch Serial Number Online
Cylindre Pocket Watch Serial Numbers
Stamping layouts have changed slightly over the years. If in doubt, please contact customer service.