Jaeger-LeCoultre
Master Ultra Thin Power Reserve
Q1378420
Dress-watch restraint with a mechanical conscience.
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Overview
The Jaeger-LeCoultre Master Ultra Thin Power Reserve (ref. Q1378420) pairs a slender 39 mm stainless steel case with the refined aesthetic of the long-running Master Ultra Thin collection. Its silvered dial carries a power reserve indicator and date sub-dial, offering functional information without disturbing the composition's classical calm. Calibre 938 powers the watch, reflecting Jaeger-LeCoultre's tradition of in-house movement manufacture.
History
The Master Ultra Thin line traces its roots to Jaeger-LeCoultre's enduring ambition to produce exceptionally thin dress watches, a discipline the manufacture has pursued across many decades. Reference Q1378420 was produced from 2014 to 2020, occupying a considered position within the collection as a steel-cased option accessible to a broader range of collectors. Its six-year production run gave it a stable presence in the modern dress-watch market before it was eventually succeeded by updated references. Among collectors, the model is appreciated for combining genuine horological substance — a power reserve complication — with the understated elegance the Master Ultra Thin name implies.
Notable points
- Calibre 938 is an in-house Jaeger-LeCoultre movement, consistent with the manufacture's policy of developing its own ébauches.
- At 39 mm, the case diameter sits at a classically proportioned size well suited to formal wear and smaller wrists alike.
- The silvered dial integrates a power reserve sub-dial and a date display without visual clutter, a hallmark of restrained dress-watch design.
- Stainless steel construction makes this reference one of the more approachable entry points into the Master Ultra Thin family.
- Production spanned 2014 to 2020, giving the reference a defined and collectible production window.
Specifications
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