In 1968, LONGINES launched the Ultra-Chron Diver, the first dive watch equipped with a high-frequency movement. At the time, LONGINES had already established itself as a pioneer in high-frequency technology. As early as 1910, the winged hourglass brand created the first high-frequency timekeeping device capable of measuring 1/10th of a second. In 1959, LONGINES developed the first high-beat movement for a wristwatch, an observatory chronometer that set new records in terms of accuracy. The new Ultra-Chron is inspired by the aesthetic codes and professional diving features of the 1968 model. These chronometer-certified watches are powered by an exclusive LONGINES calibre equipped with a silicon balance-spring and resistant to magnetic fields.
Longines Ultra-Chron Classic 40mm Mens Watch Silver Ref. L29374726
$3,250.00 Save:$200.00(6%)
Authenticity & Purchase Guarantee
- ✓ Certified Authentic: Multi-point inspection & verification by horological specialists.
- ✓ Reference: Ref. L29374726 (Longines).
- ✓ Quality Assured: Verified movement timing, original components, and documented serials.
- ✓ Express Delivery: Complimentary insured courier transit with signature confirmation (2–5 business days).
- ✓ Client Protection: 14-day inspection window and full buyer protection.
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Certified Horological Guarantee & Buyer Inclusions
Every timepiece acquired through Aurevorn Watches undergoes an exhaustive verification protocol conducted by certified master watchmakers before being cleared for client presentation.
✓ 100% Authenticity Guarantee
Verified authentic by master horologists against manufacture archives and international stolen registry databases. Unconditional lifetime authenticity guarantee.
📦 Complete Collector Set (Box & Papers)
Includes original manufacture presentation box, instruction manuals, warranty papers/card, and an official serialized Aurevorn Certificate of Authenticity.
🛡️ 2-Year Mechanical Movement Warranty
Comprehensive coverage for internal mechanical components and timing accuracy, calibrated to factory chronometric tolerances.
✈️ Armored Insured Express Delivery
Dispatched via priority armored courier (FedEx Priority Overnight / Ferrari Logistics) with 100% full replacement value transit insurance and adult signature required.
Frequently Asked Questions
Yes, unconditionally. Every timepiece is inspected by certified watchmakers who verify movement caliber, serial numbers, dial integrity, and water resistance before dispatch.
Yes. We provide a 14-calendar-day examination window. You can examine the timepiece and if it does not meet your expectations, return it in original unaltered condition for a full refund.
Our 2-Year Mechanical Warranty covers all internal movement malfunctions. Contact our horological team at info@aurevornwatches.com to arrange insured round-trip courier transit for inspection and servicing.
Product specifications
| Attribute | Details |
|---|---|
| Product Code | 17351473 |
| Manufacturer Product Number | L29374726 |
| Guarantee | Longines 5 Year Guarantee |
| Category | Watches |
| Brand | Longines |
| Brand Collection | Ultra-Chron |
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Caroline St. Claire (verified owner) –
Acquiring this Longines Ultra-Chron Classic 40mm Silver through Aurevorn Watches was a consummate luxury buying experience. The timepiece arrived in impeccable condition with all original factory boxes, stamped warranty documentation, and provenance papers fully accounted for. Timegrapher testing confirms it is beating with an impressive amplitude of 312° and running at +1.2 seconds per day. The case beveling and finishing are razor-sharp under a 10x loupe. Fully authenticated upon arrival by my independent watchmaker. Unreservedly recommended.