Cartier Baignoire Watch, Small Model, Quartz Movement, Ros
11 % below RRP
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ℹ️ 1-month trend
Price change over the past 30 days. Shows the short-term market movement — relevant if you want to buy or sell soon.
ℹ️ 4-month trend
The central metric behind the momentum score. It filters out short-term swings and shows the true, medium-term market trend of this reference.
ℹ️ Volatility
Annualised price fluctuation. Below 10 % = very stable, 10–20 % = normal, above 20 % = volatile. With high volatility the price can change quickly — in both directions. Be cautious about buying without checking the current price.
ℹ️ Momentum score
ChronoCheck's own indicator from 0 to 100, calculated from the 4-month trend, volatility and market direction.
- Above 60 — Upward trend. Good time to sell, prices are rising.
- 40 – 60 — Neutral. Stable price level, no pressure to act.
- Below 40 — Downward trend. Wait or enter at a good price.
ℹ️ Investment Grade A/B/C/D
ChronoCheck's own rating for each reference. A 0–100 point scale, made up of four weighted components:
- Momentum (40 pts) — trend strength from the momentum score.
- Liquidity (25 pts) — number of active live listings.
- Stability (20 pts) — inverse volatility — the calmer, the better.
- Source robustness (15 pts) — number of independent market sources.
- A · 75+ Trend is right, liquidity good, data broad.
- B · 55–74 Solid, but one component weaker.
- C · 35–54 Average, volatility or market breadth weigh on it.
- D · below 35 Downward or too little data — a collector's piece.
Not investment advice. Pure data analysis from aggregated market sources.
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Technical data
Cartier Ref. WJBA0031 — Variants and collector names
Known as: Small Baignoire Diamond, Baignoire Diamant Rose, Baignoire 23mm RG
Movement variants
- 057 (?–today)
Bezel variants
- WJBA0031-Bezel-RG-42Diamonds "Diamond Bezel Small Baignoire"
Dial variants
- Silver Roman Dial — Roman indices, blued sword hands (hours + minutes)
Crystal variants
- Saphirglas-Baignoire-Small-23mm
Bracelet variants
- Alligator Rot lackiert – Ardillon Roségold Ref. WJBA0031-Strap-RedAlligator-RG-Ardillon
The Cartier WJBA0031, known among collectors as the Baignoire Diamant Rose, measures a mere 23mm across its rose gold case. That's exactly the appeal for me — at this size, the Baignoire silhouette reads more elegant than any Tank, without ever tipping into dainty. The diamond-set bezel carries 42 stones, cleanly set, not an aftermarket add-on from the accessory crowd.
## The Dial Carries Cartier's Classic Signature
Silver dial, Roman numerals. Among enthusiasts, this combination goes by the code WJBA0031-Dial-Silver-Roman. Anyone examining a WJBA0031 should look closely right here: the proportion of the numerals to the 23mm dial face quickly reveals whether a dial has been swapped. On genuine pieces, the XII sits exactly centered on the crown; on fakes, this detail often drifts by 1 to 2mm.
## Caliber 057 — Solid Rather Than Spectacular
Beneath the dial sits Caliber 057, a quartz movement that's been fitted to this reference unchanged for years. No manufacture pedigree, no grande complication bragging rights — but a movement that, over 15-plus years in the field, has demanded barely any servicing. For buyers who want to wear the Baignoire as an everyday piece, that's a genuine upside, not a compromise.
## A Model Without Major Reference Jumps
No documented production changes are on record for the WJBA0031 — the model appears to have run consistently throughout. Even so, the market uses three different names for the very same piece: Small Baignoire Diamond, Baignoire Diamant Rose, Baignoire 23mm RG. That matters for resale: each of the three names turns up a different pool of listings, yet the watch itself stays technically identical, right down to the diamond count on the bezel.
Brand profile: Cartier
Cartier watches (Santos, Tank, Ballon Bleu) are popular targets for counterfeiters. The distinctive design (Roman numerals, blue sword hands) is recognizable — but also easy to copy.
- Sapphire cabochon crown: on genuine pieces it's SET INTO THE METAL (bezel-set); on fakes it's usually GLUED. Test: loupe — adhesive residue around the edge = fake.
- Bracelet screws: genuine Cartier bracelets ALWAYS have visible screw slots. Pins instead = fake.
- 'Swiss Made' at 6 o'clock: MICROPRINTED directly beneath the 6 o'clock marker. Fakes often omit it or print it crooked.
- Guilloché pattern: under 10x magnification, EXACTLY parallel and uniformly deep. Irregularities = fake.
Serial number format: Cartier serial numbers: alphanumeric, on the case back. Older models: number located between the crystal ring and the case. New purchases come with a Cartier passport.
Further sources
Buying guide: Cartier Baignoire Watch, Small Model, Quartz Movement, Ros
Market situation and price range
At $24,354 the Baignoire Watch, Small Model, Quartz Movement, Ros sits in a segment where first owners sell regularly — clean pieces with box and papers are not uncommon. The jump from "good" to "very good" usually costs 1,000 to 2,000 euros more at purchase. You get that premium back on resale if the condition is preserved.
What to look out for when buying?
- Authenticity: The serial number and reference on the case must match the papers. A professional authenticity check of the Cartier Baignoire Watch, Small Model, Quartz Movement, Ros reliably rules out counterfeits.
- Condition: Check scratches on the case and bezel — professional refurbishment can leave traces.
- Service history: A documented service by the manufacturer or a certified watchmaker increases the value.
- Scope of delivery: Box, papers and warranty card make a noticeable price difference on the Baignoire Watch, Small Model, Quartz Movement, Ros.
- Independent certification: The CPS-52 standard covers 52 checkpoints — from the serial number and the timing machine to water resistance. The result is secured on the blockchain and can be verified at any time.
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