Master Ultra Thin Date Automatic 39mm Stainless Steel and Alligator Watch, Ref. No. 1238420

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Editor's Notes

Jaeger-LeCoultre's 'Master' line ""frees itself of accessories to focus on the essential"", so this streamlined 'Ultra Thin' model is minimally designed with a discreet date window located at the six o'clock mark and slim sword-shaped hands – aficionados will notice that the hour-markers are subtly lengthened to increase legibility. Built in Switzerland using the house's reliable calibre 899/1 movement, it has a stainless steel case and exhibition back that's a delight to examine up close.

We offer an eight-year warranty for all working parts and manufacturing faults for Jaeger-LeCoultre watches. For more information, contact one of our experts by emailing watches@mrporter.com

Details & Care


  • Swiss-made automatic calibre 899/1 movement with 38-hour power reserve
  • 32 jewels, 28,800 Vph


  • Hour, minute and second hands
  • Date window


  • Silver sunray dial


  • Stainless steel case
  • Crown for date and time adjustments and manual winding
  • Anti-reflective, scratch-resistant sapphire glass crystal
  • Exhibition case back
  • Buckle-fastening black alligator strap


  • Case diameter: 39mm; case thickness: 7.8mm
  • Water resistance: 5 bar
  • Comes in a presentation box
  • Alligator: USA
  • Reference number: 1238420
Delivery and Returns
Find out more about our delivery options. Try items in the comfort of your own home. If they're not quite right, you've got 28 days to request an exchange or return and send them back to us. We'll collect them from your home or office for free.
Product Code 16301891330334948

Returns or Exchanges

Try your purchase in the comfort of your own home and, if it’s not quite right, let us know and we’ll arrange a free collection from your home or office.