FREE U.S. Shipping  •  Complimentary Engraving  See Details
Live Chat Software Live Chat    Email   866-323-8463
Free Engraving

Add a free laser engraved message (up to 20 characters) to any watch over $300. Just add your watch to the cart, click on "Engrave" to add your personal message and then add code ENGRAVE during checkout.

Sign In  |  List  |  Cart
Live Chat Support Software

Jaeger-LeCoultre Duometre a Quantieme Lunaire 40.5mm Mens Watch
Model Q6042521

View Details
Retail Price
Our Price
Your Savings
$7,720.00 (20%)
Make an Offer Add to Watch List
Available SHIPS FREE in 7 business days. Order today for expected shipment on Wednesday, May 18.
30 DAY

Have questions?

Order by phone or get advice. Our watch experts are here to help.
Call 866-323-8463, 718-663-3970 Live Chat or email us.
Call 866-323-8463, 718-663-3970 or email us.

Watch Details

Item Number:
Brand Name:
Style Number:
Also Called:
6042521, 604.25.21, 604-25-21, Duometre RG
Duometre a Quantieme Lunaire 40.5mm
Style (Gender):
Case Material:
18k Rose Gold (Pink Gold), Polished and Brushed
Dial Color:
Hand-grained, silver-colored
Mechanical Manual Wind
Jaeger-LeCoultre Calibre 381 (21,600vph, 369 parts,)
Number of Jewels:
Hours, Minutes, Seconds, Jumping-second, Date, Moon-phase (North and South), Central hours, minutes and seconds, Power reserve, Chronograph: concentric hours and minutes, minute-unit indicator, seconds, jumping seconds, chronograph power reserve
Watch Chronograph:
Single push-piece to control the chronograph and jumping seconds; start/stop/reset
Crystal Material:
Sapphire Crystal - Domed, Anti-reflective both sides
Case Diameter:
40.5 mm
Sapphire Crystal Display Back
Bezel Material:
18k Rose Gold
Bezel Function:
Water Resistance:
50m / 165ft ( suitable for very light splashing; unsuitable for rain, showering, swimming or diving)
Crown Material:
18k Rose Gold, starts watch, winds power-reserve clockwise, chronograph counter-clockwise, hrs, mins
Power Reserve:
50-hour power reserve
Watch Bracelet / Strap Material:
Alligator - Dark Matt Brown
Watch Clasp Material:
18mm double-folding Clasp in 18k Rose Gold
Max Wrist Size:
First Production Year:
Additional Information
The Duomètre à Quantième Lunaire embodies the latest in horological achievements of Jaeger-LeCoultre: it displays time with a jumping seconds hand showing 1/6th of a second increments and additionally providing the date and the age of the moon in a separate sub dial. The true genius of this watch however lies within the Dual-Wing movement concept, which features two independent power supplies: one entirely dedicated to creating a perfect timing foundation – regulated by escapement and balance –, the other solely for the display of time – hour, minute and seconds hands – as well as date and the age of the moon for the Northern as well as the Southern hemisphere. Both are synchronized through the jumping seconds hand mechanism driven by the escapement. With the Duomètre line, Jaeger-LeCoultre breaks new ground in terms of the accuracy of mechanical wristwatches, for it devised a completely new movement structure in order to gain the highest possible precision. Therefore the watchmakers have come up with the so called Dual-Wing concept to bypass a common problem in mechanical watches: any additional complication reduces the power of the winding barrel thus depriving the precisely tuned regulation organ of a steady flow of energy from the winding barrel. The regularity of the winding barrel’s energy to the going train and escapement remains of primary importance in order to measure time with the precision demanded for today’s mechanical wristwatches.
FREE bracelet resizing. Learn more.

About Jaeger-LeCoultre

Since 1833, when the inventive Charles Antoine LeCoultre established this venerable watchmaker, it has produced some of the most outstanding and innovative timepieces. It wasn't until 1931, however, that the Jaeger-LeCoultre brand rose to international fame. It was then that the Reverso - an ingenious reversible watch - was unveiled to the public.
This watch is the Jaeger-LeCoultre Duometre a Quantieme Lunaire 40.5mm Q6042521.

View Other Watch Series by Jaeger-LeCoultre

Jaeger-LeCoultre Master Dual Time   Model: Q1622430
Master Dual Time
Jaeger-LeCoultre Master Compressor   Model: Q1718470
Master Compressor
Jaeger-LeCoultre Master Geographic   Model: 142.84.21
Master Geographic
Jaeger-LeCoultre Grande Reverso Ultra Thin   Model: Q3808420
Grande Reverso Ultra Thin
Jaeger-LeCoultre Master Chronograph   Model: Q1538420
Master Chronograph
Jaeger-LeCoultre Master Grande Reveil   Model: Q163247A
Master Grande Reveil
Jaeger-LeCoultre Master Hometime   Model: Q1628120
Master Hometime
Jaeger-LeCoultre Grande Reverso Ultra Thin Duoface   Model: Q3782520
Grande Reverso Ultra Thin Duoface
Jaeger-LeCoultre Master Tourbillon   Model: Q1322410
Master Tourbillon
Jaeger-LeCoultre Master Calendar   Model: Q1552520
Master Calendar
Jaeger-LeCoultre Grande Reverso Calendar   Model: Q3752520
Grande Reverso Calendar
Jaeger-LeCoultre Master Eight Days   Model: Q1612420
Master Eight Days

100% Authentic

This watch is guaranteed 100% authentic, has original serial numbers and is shipped in factory-fresh, brand new, unworn condition with all manufacturer documentation and packaging.

Package contains watch manufacturer's certificate of authenticity (if such certificate is applicable, and provided by the manufacturer), tags, stickers, boxes, and user manuals.

30 Day Returns

We will gladly accept returns within 30 days of receipt of delivery. Watches must be returned to us in brand new, unworn and undamaged condition. All domestic purchases showing as "In Stock" under $3000 will receive a full refund minus shipping fees. A 10% restocking fee will apply on all other orders. Read more.

Free Shipping

Gemnation ships your domestic order free via FedEx Insured Standard Delivery (3-5 days) after your order has been processed. Please read the additional information section next to the watch to determine processing times. Watches costing less than $200, will be shipped via FedEx Ground. Read more.

Two Year Warranty

We sell luxury timepieces at considerably lower prices than the manufacturers list price. Gemnation is not an Authorized Jaeger-LeCoultre Watch Dealer and is not affiliated with Jaeger-LeCoultre. Authorized dealers are not permitted to discount or sell watches on the Internet. For this reason, we choose not to be authorized watch dealers for many of the brands that we sell.

Since we are not authorized dealers for many of the watch manufacturers, we may be unable to ship the original watch manufacturers warranty. In all cases, however, we provide a Two Year Gemnation Warranty (active from the date of purchase).
Two Year Warranty
Gemnation utilizes a full-time Swiss-trained watchmaker who is licensed and trained to repair every brand and model of watch that we sell. If we can supply the original warranty we provide this information in the individual watch description. Read More.

Recently Viewed