Skip to product information
Jaeger-LeCoultre Master Ultra Thin Moon 39mm Steel Silver Dial Leather Strap Q1248421
  • Jaeger-LeCoultre Master Ultra Thin Moon 39mm Steel Silver Dial Leather Strap Q1248421
  • Jaeger-LeCoultre Master Ultra Thin Moon 39mm Steel Silver Dial Leather Strap Q1248421
Jaeger-LeCoultre Master Ultra Thin Moon 39mm Steel Silver Dial Leather Strap Q1248421

Jaeger-LeCoultre Master Ultra Thin Moon 39mm Steel Silver Dial Leather Strap Q1248421 Jaeger-LeCoultre Master Ultra Thin Moon 39mm Steel…

Reference Q1248421

Full watch configuration

Jaeger-LeCoultre Master Ultra Thin Moon 39mm Steel Silver Dial Leather Strap Q1248421

$9,078.00

By Jaeger-LeCoultre

Sourced to order. We confirm the watch, condition and final price before purchase. Reference images shown.

Ask a question WhatsApp
Meet our family team Miami Beach appointments Customer reviews Buyer protection Watch services
Trade toward this watch Sell a watch like this

Eligible watches: 90-day returns for store credit only. Brand-new watches and other exclusions are final sale. Return terms.

Jaeger-LeCoultre Master Ultra Thin Moon 39mm Steel Silver Dial Leather Strap Q1248421

Jaeger-LeCoultre Master Ultra Thin Moon 39mm Steel Silver Dial Leather Strap Q1248421

Current Catalogue Asking Price:

Your Offer

$

Submit your offer for review. Availability and the final price require confirmation.

Preferred Contact Method
I have a trade-in / add a note

Reserve with $200

Jaeger-LeCoultre Master Ultra Thin Moon 39mm Steel Silver Dial Leather Strap Q1248421

Catalogue watch price: $9,078.00 USD

Your $200 deposit is applied to the watch’s purchase price. It is refundable only if Bizak & Co. cannot fulfill your order.

Estimated remaining balance: $. Pay by bank wire or cryptocurrency after we confirm your watch and final invoice. Shipping and applicable taxes are additional.

Shipping details · Return terms

Watch shipping is paid with the final balance: $100 for U.S. overnight delivery or $500 internationally. Applicable taxes and import charges are additional.

After payment, our team starts the tailored search and contacts you to confirm the specific watch and final invoice. A deposit does not guarantee a unit, the listed price or a delivery date.

Need installments? Check eligibility before paying a deposit.

Speak with a Bizak & Co. specialist about this piece

|Call or Text

The Jaeger-LeCoultre Master Ultra Thin Moon Q1248421 is a 39mm stainless steel dress watch featuring a clean silver dial with index hour markers and a classic leather strap. Combining the house's legendary commitment to ultra-thin elegance with a refined moonphase complication, this reference represents one of the most coveted entries in the Master Ultra Thin collection.

The Q1248421 stands out for its understated yet technically accomplished character — a slim steel case, luminous silver dial, and supple leather strap make it equally at home at a boardroom table or a black-tie event. Contact Bizak & Co. today to purchase this Jaeger-LeCoultre Master Ultra Thin Moon online at the best available price.

Compare it across every Master Ultra Thin Moon reference we carry, or browse the full Jaeger-LeCoultre collection at Bizak & Co.

Buy this Master Ultra Thin Moon, trade in your current watch, or sell us yours. Contact Bizak & Co. to make an offer or request a fair-market valuation.

Not the exact one you’re looking for?

Source your dream watch

Learn More

The Jaeger-LeCoultre Master Ultra Thin Moon Q1248421 is one of the most eloquent expressions of haute horlogerie available at the 39mm case size. Jaeger-LeCoultre, founded in the Vallée de Joux in 1833, built its reputation on combining exceptional movement manufacture with an instinct for refined design, and the Master Ultra Thin line sits at the very heart of that tradition. Thin-cased dress watches have been a JLC hallmark for decades, and the Master Ultra Thin Moon distills that philosophy into a wearable everyday masterpiece.

At 39mm in stainless steel, the Q1248421 occupies a sweet spot that flatters a broad range of wrist sizes while remaining unmistakably elegant. The brushed and polished steel case is crafted to exacting tolerances, presenting a sleek profile that slides effortlessly beneath a shirt cuff. The stainless steel bezel is unadorned and architectural, drawing the eye inward toward the dial rather than competing with it.

The silver dial is a study in confident restraint. Index hour markers replace numerals, lending the face a contemporary minimalism that nonetheless feels thoroughly classical. The moonphase display — the defining complication of this reference — is typically rendered with romantic precision, tracking the lunar cycle in a subdial that adds depth and poetry to what might otherwise be a straightforward time-only watch. Silver as a dial color interacts beautifully with changing light, shifting from warm ivory tones in candlelight to crisp platinum in daylight.

The watch is presented on a leather strap that completes the dressed-down luxury aesthetic. Leather complements the case proportions and keeps the overall weight light on the wrist, making extended daily wear a genuine pleasure. Whether paired with a suit or smart-casual attire, the Q1248421 transitions effortlessly across occasions.

Bizak & Co. sources luxury timepieces with a rigorous commitment to authenticity, and every watch we offer is verified before it reaches your wrist. If you are looking to buy the Jaeger-LeCoultre Master Ultra Thin Moon Q1248421 online at the best price, we invite you to reach out to our team directly — we are here to answer every question and make your acquisition seamless.
Technical Details
Reference
Q1248421
Model
Master Ultra Thin Moon
Case material
Stainless Steel
Bracelet material
Leather
Dial
silver with index hour markers
Case size
39mm
FAQ

1. What makes the Jaeger-LeCoultre Master Ultra Thin Moon Q1248421 special?
The Q1248421 unites Jaeger-LeCoultre's iconic ultra-thin design philosophy with a romantic moonphase complication in a versatile 39mm stainless steel package. The silver index dial and leather strap give it a timeless dress-watch aesthetic that few competitors at this size can match. It is the kind of watch that works equally well as an everyday companion and a formal occasion piece.

2. What movement powers the Jaeger-LeCoultre Master Ultra Thin Moon Q1248421?
Jaeger-LeCoultre is a full manufacture, meaning it designs and produces its own movements in-house in the Vallée de Joux, Switzerland. The Master Ultra Thin Moon line is powered by an in-house caliber engineered for a slim profile while incorporating the moonphase complication. Specific caliber details for this reference should be confirmed with Bizak & Co. or the official Jaeger-LeCoultre documentation supplied with the watch.

3. What is the case size of the Q1248421?
The Jaeger-LeCoultre Master Ultra Thin Moon Q1248421 features a 39mm stainless steel case. This diameter is widely regarded as a versatile and elegant size, fitting comfortably on a range of wrist sizes without appearing oversized. The slim, ultra-thin profile further enhances its wearability.

4. Is the Jaeger-LeCoultre Master Ultra Thin Moon suitable for everyday wear?
Yes — the 39mm stainless steel case is robust enough for daily use, and the leather strap makes it comfortable for extended wear throughout the day. While it excels as a dress watch, its understated design means it transitions naturally into smart-casual settings as well. The moonphase complication adds a touch of horological interest without complicating the wearing experience.

5. What does the dial look like on the Q1248421?
The dial is finished in silver with index hour markers, creating a clean and contemporary face that remains unmistakably classic. The moonphase subdial introduces an element of visual depth and craftsmanship to the otherwise restrained layout. Silver dials are highly practical, offering excellent legibility across a variety of lighting conditions.

6. How can I buy the Jaeger-LeCoultre Master Ultra Thin Moon Q1248421 from Bizak & Co.?
You can purchase the Q1248421 directly through bizakandco.com or by contacting the Bizak & Co. team for personalized assistance. We welcome inquiries via our website contact form or by phone.

Certified Authenticity

Every watch is authenticated before delivery.

Real Family Business

You're buying from genuine people, 30 years in business.

Bizak & Co. Warranty

Every watch is checked by us before shipping.

5 Years Warranty

Our five-year Bizak & Co. warranty covers manufacturing defects affecting mechanical operation under normal use, starting on delivery. It is separate from any remaining manufacturer warranty.

Exclusions include accidental damage, misuse, water damage, cosmetic damage, normal wear, loss and theft. Coverage and service availability for vintage or modified watches are confirmed in writing before purchase.

Read the full warranty terms and service instructions. 

90-Day Returns for Store Credit

Eligible watches may be returned within 90 days for store credit. Brand-new watches and other exclusions are final sale.

Read eligibility, condition requirements, and exclusions.

Insured delivery

Insured shipping

U.S. overnight shipping is $100; international shipping is $500. Dispatch takes 2–3 business days after your wire clears. International transit times vary. Shipping details.

You might also like...

Customer Reviews

Read our reviews on Trustpilot

  • Great family business

    Great family business. They went out of their way to make my purchase go smoothly, they definitely earned my watch business!

    Paul

    Read on Trustpilot ↗

  • Good seller

    Good seller. Honest family

    Mateusz

    Read on Trustpilot ↗

  • Honest family company

    Honest family company. I’ve done business many times!

    Mollie

    Read on Trustpilot ↗

  • Trusted Seller

    Trusted Seller, Definitely recommend for all watches purchase!

    Consumer

    Read on Trustpilot ↗

  • Trusted and honest seller

    Trusted and honest seller. Deal with confidence.

    Jean Dib

    Read on Trustpilot ↗