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Longines La Grande Classique 24mm Diamond Dot Quartz Ladies Watch
Ref. L42092877
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La Grande Classique has been Longines' premier dress proposition since its 1992 launch, and this 24mm version represents the collection at its most jewellery-adjacent. The L209 calibre was chosen specifically to keep the case at 4.3mm — thinner than most dress watches at any price — and at 44.6 grams the whole thing barely registers on the wrist. That combination of almost no height and almost no weight is genuinely unusual, and it is what separates this from competitors that achieve a similar look without quite achieving that disappearing quality on the wrist. The mother-of-pearl dial carries twelve Top Wesselton VS-SI diamonds totalling 0.048 carats as hour markers, which gives just enough light-catching detail against the iridescent surface without pulling the dial toward ostentation. The two-tone bracelet integrates directly into the lug design rather than attaching in the conventional way, so the transition from case to bracelet reads as a single unbroken line — something that matters considerably at this scale.
- Reference
- L42092877
- Brand
- Longines
- Case size
- 24mm
- Case thickness
- 4.3mm
- Lug width
- 13mm
- Case material
- Gold PVD
- Case shape
- Round
- Dial
- Mother-of-pearl
- Crystal
- Sapphire
- Movement
- Quartz
- Calibre
- L209
- Water resistance
- 30m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Two-tone
- Clasp
- Deployant clasp
- Lume
- Luminous
- Retailer
- Goldsmiths
Additional specifications
- Lug-to-lug
- 29.6mm
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?
No. At 30m it will survive rain and handwashing, but not submersion of any kind.
Will the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Does it need a battery?
Yes. It is quartz, so expect a battery change every two to three years at a jeweller.
What size strap does it take?
13mm. 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 29.6mm, which suits wrists from roughly 15cm (6 inches) upward.
Lug-to-lug decides fit more than case diameter does.
Is it a men's or women's watch?
Listed as women'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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