Master Ultra Thin Power Reserve Q1378421

An exquisite icon of horological mastery, the Master Ultra Thin Power Reserve Q1378421 represents the finest tradition of Swiss watchmaking. Crafted by renowned maison Jaeger LeCoultre, this distinguished timepiece combines a sculptured Stainless Steel case, 39 mm with a precision-engineered Swiss Mechanical Chronograph Movement, delivering commanding wrist presence and timeless sophistication.

Timepiece Highlights & Technical Specifications

• Maison / Brand: Jaeger LeCoultre
• Collection: Master Control
• Model Reference: inement.
• Case Material: Stainless Steel
• Case Dimensions: 39 mm
• Dial: Silver Dial
• Movement: Swiss Mechanical Chronograph Movement
• Water Resistance: 5 bar
• Condition: Brand New / 100% Authentic Swiss Luxury Timepiece
• Inclusions: Accompanied by CJ Charles Presentation Gift Box & Certified Documentation

Horological Legacy & Wrist Presence

Celebrated for its racing heritage and high-precision timing complications, this chronograph effortlessly balances sporting utility with boardroom elegance. It is engineered for discerning individuals who appreciate mechanical perfection.

Manufacturer & Technical Details

"Faithful to the emblematic watchmaking spirit of the collection, the Master Ultra Thin Power Reserve watch epitomises the subtle blend of technical prowess and aesthetic refinement. In this understated stainless steel version, the case with its curved lugs features a dial with unique architecture - a signature element of the model. The elongated hour-markers, double polished and satin-finished Dauphine hands, Jaeger-LeCoultre applied logo, opaline counters and minute track dots stand out harmoniously against the silver sunrayed background. The in-house Calibre 938 lies at the heart of the watch, equipped with a silicon escapement offering a power reserve of 70 hours, providing real comfort: there is no need to wind the watch, even after a whole weekend without wearing it. Beneath its slender case, which reflects the watchmaking expertise of La Grande Maison, this high-precision watch defies times with as much boldness as sophistication. Case Stainless steel Diameter: 39 mm Thickness: 8.95mm Water resistance 5 bar Dial Rhodium-plated hour-markers, Silvered grey, sunray-brushed FUNCTIONS Hour - Seconds, Hour - Minute, Date, Power-reserve Automatic winding"

The CJ Charles Jewelers Horology Promise

Serving luxury watch collectors in La Jolla, San Diego and worldwide since 1988, CJ Charles Jewelers is an authorized retailer and specialist in Swiss haute horlogerie. Every pre-owned timepiece is thoroughly inspected, timed on digital vibrograf machines, and certified by our in-house master watchmakers. Your timepiece arrives in our signature luxury gift packaging, backed by complimentary fully insured white-glove shipping and dedicated concierge support.

Specifications above are taken directly from this piece's catalog data.

Complimentary insured shipping on every U.S. order — no minimum, no code. We ship via UPS Ground, FedEx Home Delivery, USPS Priority, fully insured, with signature confirmation on high-value pieces.

Free 30-day returns: unworn pieces in original packaging can be returned within 30 days of delivery for a full refund — we email you a prepaid, insured return label.

Full shipping policy · Full returns policy

Every piece we sell is guaranteed genuine — inspected before dispatch, with serial numbers intact and documentation as described. If any piece were ever proven otherwise, we refund you in full.

Read our Authenticity Promise