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Longines Conquest Quartz 38mm Mens Watch Green
Ref. L37504096
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Stepping up in the same colour and case shape
The Conquest name has been registered with the Swiss Federal Intellectual Property Office since 1954, making it one of the few watch collections with a formally protected identity. This 38mm quartz version, new for 2026, sits in the middle of the L3.750 family alongside sandblasted black, white and blue siblings — the green dial here takes a sunray finish rather than sandblasted texture, which gives it a different quality of light: it shifts from deep forest to brighter tones depending on the angle. At 9.20mm thick, the case wears closer to the wrist than most people expect from a steel sports watch, and 38mm is a size that disappears under a cuff without effort. The movement is the L157.3, Longines' designation for the ETA Precidrive E64.111 — a thermocompensated quartz that runs significantly more accurately than a standard quartz oscillator, with around 25 months between battery changes. The date sits at six o'clock, which keeps the dial symmetrical through the other five hours. The 19mm lug width is worth noting before buying: it is an uncommon size that narrows the aftermarket strap options considerably, and without quick-release spring bars, changing the bracelet requires a tool.
- Reference
- L37504096
- Brand
- Longines
- Collection
- Conquest
- Case size
- 38mm
- Case thickness
- 9.20mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Green
- Crystal
- Sapphire
- Movement
- Quartz
- Calibre
- ETA E64.111
- Functions
- Date
- Water resistance
- 100m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Butterfly clasp
- Lume
- Luminous
- Retailer
- Mappin & Webb
Additional specifications
- Weight
- 116g
- Origin
- Swiss made
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.
Also in 3 collections
This watch appears in the Longines Conquest range (60), Stainless Steel Watches (2,833) and Green Dial Watches (392).
Temporarily out of stock
Mappin & Webb is not currently taking orders for this reference. Last listed as available on 26 September 2026. Stock is checked nightly and this page updates when it returns.
What the specifications mean
Strengths
- 100m water resistance covers swimming and watersports
- 38mm suits most wrists
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
- Sits in the lower half of Longines's range as we list it
Longines Conquest alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | L37504096 | 98A335 | YA163407 |
|---|---|---|---|
| Price | £1,300 | £1,250 | £1,510 |
| Case size | 38mm | 41mm | 38mm |
| Water resistance | 100m | 100m | 30m |
| Movement | Quartz | Quartz | Quartz |
| Strap | Stainless steel bracelet | Stainless steel bracelet | Stainless steel bracelet |
| This watch |
|
|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 100m it is rated for swimming and snorkelling, though not for diving.
Water resistance explainedWill the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Sapphire, mineral and acrylic comparedDoes it need a battery?
Yes. It is quartz, so expect a battery change every two to three years at a jeweller.
Quartz, automatic and solar comparedIs it a men's or women's watch?
Listed as men's, though at 38mm it sits in the range that suits anyone.
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