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Longines HydroConquest Quartz 42mm Mens Watch Bi-Colour Blue
Ref. L37693967
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Stepping up in the same colour and case shape
The HydroConquest has always occupied a deliberate position in the Longines catalogue — a working diver's tool finished to the standard expected of a Swiss dress watch. This quartz variant sits within a revised generation of the line, updated with clean applied baton indexes and dot markers in place of the large Arabic numerals that characterised earlier models, a change that gives the sandblasted blue dial a more composed, contemporary character. At 42mm the watch has real presence, but at 11.3mm thick it slips under a cuff in a way that surprises for something rated to 300 metres — most dive watches at this depth rating are noticeably thicker. The two-tone bracelet pairs polished yellow PVD centre links with brushed outer links, and the combination of warm gold and steel reads against the blue dial without tipping into excess. The unidirectional rotating bezel carries an aluminium insert in matching blue, keeping the palette coherent across the whole piece. The L157 calibre is Longines's workhorse quartz movement, chosen here for accuracy and resistance to the conditions a 300-metre rating invites. The Super-LumiNova coating is generous, and the double safety folding clasp with its push-piece release holds securely without the fumbling that simpler clasps require when hands are wet.
- Reference
- L37693967
- Brand
- Longines
- Collection
- HydroConquest
- Case size
- 42mm
- Case thickness
- 11.3mm
- Lug width
- 21mm
- Case material
- Two-tone
- Case shape
- Round
- Dial
- Blue
- Crystal
- Sapphire
- Bezel
- Unidirectional rotating
- Movement
- Automatic
- Calibre
- L157
- Functions
- Date
- Water resistance
- 300m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Two-tone
- Clasp
- Folding clasp
- Lume
- Super-LumiNova
- Retailer
- Goldsmiths
Additional specifications
- Lug-to-lug
- 51.2mm
- Origin
- Swiss made
- Warranty
- 2 years
Learn more about Longines
Auguste Agassiz began trading watches in Saint-Imier in 1832, but the modern company dates from 1860, when his nephew Ernest Francillon built a factory in the meadows beside the Suze — the longines of the local dialect — and consolidated the scattered outworkers of the region under one roof.
Longines registered its winged hourglass in 1889. It is the oldest watch trademark still in continuous use.
The company's identity was built on precision and on timing things in public. It supplied chronographs for the first modern Olympic events it timed in 1896, timed the 1912 Federal Gymnastics Festival with a broken-wire mechanism accurate to a hundredth of a second, and developed the photo-finish camera and the quartz timing devices used across twentieth-century athletics.
Its aviation associations are equally deep. Longines instruments were carried by Charles Lindbergh across the Atlantic in 1927, and the Hour Angle watch, designed to Lindbergh's own specification to simplify longitude calculation, remains in the catalogue. Amelia Earhart and Howard Hughes both navigated by Longines.
The house was among the most decorated at nineteenth-century observatory trials, holding numerous precision records. Since joining the Swatch Group in 1983 it has occupied the accessible-heritage position: exclusive ETA-based movements, archive-driven designs through the Heritage line, and volume that makes it one of the group's most important brands.
- 1860
- Ernest Francillon builds the factory at Les Longines.
- 1889
- The winged hourglass is registered — the oldest watch trademark in use.
- 1912
- Broken-wire timing achieves hundredth-second accuracy.
- 1927
- Lindbergh crosses the Atlantic with Longines instruments.
- 1983
- Becomes part of the Swatch Group.
Manufacturer’s guarantee
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 300m it is rated for swimming, snorkelling and recreational diving.
Will the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Does it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
What size strap does it take?
21mm. Any strap of that width will fit, and on most modern watches quick-release bars make the swap a two-minute job with no tools.
Will it fit my wrist?
Lug-to-lug is 51.2mm, which suits wrists from roughly 17.5cm (7 inches) upward.
Lug-to-lug decides fit more than case diameter does.
Is it a men's or women's watch?
Listed as men's.
Cheapest place to buy
Goldsmiths is the only UK retailer we track stocking this reference, so there is nothing to compare it against today.
Who are Goldsmiths?
Goldsmiths has been selling watches in Britain since 1778 and is part of the Watches of Switzerland Group, which is listed on the London Stock Exchange. They are an authorised dealer, so a watch comes with the manufacturer’s own warranty.
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