Mechanics 8 min read
How an automatic watch works
Your wrist gives it energy. A spring saves it. A tiny balance sets the rhythm. Follow the journey inside an automatic watch, one pencil drawing at a time.
Jaeger-LeCoultre · Master Ultra Thin
Master Ultra Thin Moon
Ref. 136255J
Watch details and strap advice
- Case diameter
- 39 mm
- Case height
- 9.9 mm
- Case material
- Rose Gold
- Case shape
- Round
- Water resistance
- 50 m
- Movement
- Automatic
- Caliber
- 925/1
- Dial
- Grey
The Jaeger-LeCoultre Master Ultra Thin Moon Pink Gold / Grey / Boutique Edition takes a 21 mm strap: measure between the lugs and that is the only number you need. We list 6 straps in that width. A dress watch by proportion: a slim leather strap, plain or lightly stitched, keeps the line clean. With a 39 mm case and 50 m of water resistance, a strap of medium thickness keeps the balance. Automatic movement. Most straps here come with quick-release spring bars, so the swap takes a minute and no tool.
Straps by lug width (21 mm) 6
All 6 21 mm strapsWidth is a starting point. Check the case and end fittings before choosing.
-
Deployant RubberRubber€49.90 -
Sailcloth WeaveNylon€27.90 -
Suede RallyLeather€34.90 -
Classic EmbossedLeather€24.90 -
Epsom GrainLeather€27.90 -
Heritage SuedeLeather€29.90
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