Jaeger Lecoultre
Master Ultra Thin Date
Ref. Q1238420
The Jaeger-LeCoultre Master Ultra Thin Date (Q1238420) is a sleek, dress-oriented automatic watch known for its ultra-thin 7.5–7.8mm profile and sophisticated design. It belongs to the Master Ultra Thin collection, celebrated for its refined aesthetics and exceptional craftsmanship, including a date function and a silvered-grey dial. The watch balances elegance with technical precision, featuring a self-winding movement and water resistance for everyday wear.
braceletLeather (black) or Alligator
movementJaeger-LeCoultre Caliber 899/1, Automatic, Self-Winding, 219 components, 28,800 vph, 32 jewels, 3.3mm thickness, 38–70 hours power reserve
functionsDate, Hours, Minutes, Seconds
lug width45.8mm
dial colorSilvered grey (or blue, per conflicting sources; primary source confirms silvered grey)
case diameter39mm
case materialStainless Steel
water resistance50 meters (5 bar)
A registered Jaeger Lecoultre Q1238420 carries a permanent RGATT passport: origin, history and owners, verifiable by anyone, and a documented history makes a watch easier to sell.