Hydroconquest GMT
Ask about this piece.
Condition report.
Overall condition: Used. Condition is Very good (minor signs of wear) - The item shows minor signs of wear, such as small, intangible scratches..
Detailed report
- Case
- Barely visible - a few barely visible scratches; no signs of polishing.
- Dial
- None - like new; no scratches or other signs of wear; unpolished.
- Bezel
- Barely visible - a few barely visible scratches; no signs of polishing.
- Crystal
- None - like new; no scratches or other signs of wear; unpolished.
- Case back
- Barely visible - a few barely visible scratches; no signs of polishing.
The Longines HydroConquest GMT, reference L3.790.4.56.6, is the watch that proves you do not need to spend a fortune to own a serious, technically accomplished GMT dive watch with genuine Swiss manufacture credentials. This certified pre-owned example from 2026 is offered in very good condition and comes with its full original set, including box, papers, and all original accessories.
Crafted in stainless steel with a black ceramic unidirectional rotating bezel featuring a luminescent capsule at 12 o'clock, the L3.790.4.56.6 presents the HydroConquest GMT in a well-proportioned 41mm case measuring 12.9mm in height, with a screw-down caseback and crown delivering a robust 300 metres of water resistance. Built to ISO 6425 professional diver's standards and tested accordingly.
The black sunray dial is clean, deep, and highly legible, with applied luminescent indexes, silvered polished hands coated with Super-LumiNova, a date display, and the essential additional 24-hour GMT hand for simultaneous tracking of a second time zone. Everything a serious sport watch needs, nothing it does not.
Powering the watch is the Longines Calibre L844, an in-house exclusive automatic movement with silicon balance spring, beating at 25,200 vibrations per hour with an impressive 72-hour power reserve and exceptional resistance to magnetic fields. A movement that punches well above the collection's price point in terms of technical accomplishment.
The watch is fitted with a stainless steel bracelet with double security folding clasp and micro-adjustment system, offering both security and a comfortable, versatile fit for everyday wear.
Available now at Minty Watches, this certified pre-owned luxury watch is a compelling opportunity for collectors of pre-owned luxury timepieces in Geneva.
A pre-owned watch in Geneva that delivers serious watchmaking at a seriously smart price.
CPO · WORKSHOP
Hand-checked, before it ever reaches your wrist.
Every watch passing through the showroom is opened, inspected, timed and pressure-tested by our watchmaker. We document the condition honestly and price it accordingly. If a watch has been polished, serviced or has aftermarket parts, we say so.
What's included.
12-month coverage.
International warranty on every watch we sell. Movement, water resistance and authenticity.
Flexible & private.
SEPA, SWIFT, card or cryptocurrency (BTC, ETH, USDC). Financing up to CHF 20,000 for Swiss resident.
Tax-free.
Buying from outside Switzerland? You leave with your tax refund forms in hand and get back 8.1%.
Insured worldwide.
Fully-insured express delivery via DHL or FedEx. You can also pick-up the watch from our location.
Try it on, in Geneva.
Pictures only tell half the story. Book an hour with us, coffee or whisky, your call, and put this Longines on your wrist before you decide.
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