Rolex Lady Oyster Perpetual
8 % 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
Rolex Ref. 177200 — Variants and collector names
Known as: OP 31, Midsize OP, OP Midsize
Production phases and changes
- 2005: Introduction of ref. 177200 as successor to ref. 77080 (31mm OP no-date)
- 2008: Serial number engraving moves from the lugs (6 o'clock) to the rehaut inner ring
- 2010: Switch to randomized alphanumeric serial number system
- 2014: Switch from Cal. 2230 to Cal. 2231 (Paraflex, Parachrom); introduction of vivid lacquer dials
- 2020: Superseded by ref. 277200 with Cal. 2232 (55h power reserve, Syloxi hairspring)
Movement variants
- 2135 (2005–2009) · 28800 bph
- 2235 (2009–2014) · 28800 bph
- 2230 (?–today) · 28800 bph
- 2231 (?–today) · 28800 bph
Bezel variants
- Smooth Domed Steel Fixed
Dial variants
- Black Index — Index hour markers with Arabic 3-6-9 numerals
- Blue Azzurro Roman — Roman numerals
- Candy Pink Lacquer — Index/Arabic markers
- Dark Grey Roman — Roman numerals
- Red Grape Roman — Roman numerals
- Silver Sunburst — Index hour markers with luminous Arabic 3-6-9 numerals
- White Index — Index hour markers with Arabic 3-6-9 numerals
Crystal variants
- Sapphire Flat No-Cyclops
Bracelet variants
- Oyster Solid Ref. 78350
- Oyster Three-Piece Link Ref. Oyster-3Link-SEL
Serial numbers
- Z/A-Serie (ca. 3,5M) – M/N-Serie (ca. 9,0M) (2005–2009) — Sequential serial numbers. Engraved between the lugs at 6 o'clock until ca. 2007; from ca. 2007/2008 gradually relocated to the rehaut inner ring. Precise year attribution possible using the Bob's Watches Serial Chart.
- random (alphanumerisch) – random (alphanumerisch) (2010–2020) — From ca. 2009/2010, randomized alphanumeric serial number system. No reliable year determination from the serial number alone — the warranty card is the only reliable source.
Rolex introduced the 177200 in 2005 as the successor to the ref. 77080: a 31mm case in 904L Oystersteel, no date, domed steel bezel, Cal. 2230. In the trade it goes by OP 31 or Midsize OP — the official catalog name is Oyster Perpetual 31. The launch lineup covered four dials, including Silver Sunburst and White. Early pieces carry the serial engraving at the lug shoulders at 6 o'clock; around 2008 Rolex moved that engraving to the rehaut inner ring.
## The Internal Overhaul You Can't See from the Outside
From 2014 onward, the case houses Cal. 2231. The blue Parachrom hairspring makes the movement antimagnetic, and the Paraflex shock absorber improves impact resistance by 15% over the original Cal. 2230. At the same time, Rolex expanded the dial range with bold lacquer colors in Roman numerals: Azzurro Blue and Red Grape arrived in 2014, with Candy Pink following later. From 2010 onward the serial number system went random — dating a piece by serial number alone has been impossible ever since, and only the warranty card provides a reliable year.
## Out of the Catalog, Not Out of the Market
The 177200 was discontinued in 2020 with the arrival of the 277200 (Cal. 2232, 55-hour power reserve, Syloxi silicon hairspring). Since then a price gap has opened up between the two references — one that works squarely in favor of pre-owned buyers. Seven dial options in a 31mm steel case, technically sound: the 177200 is not old stock being cleared out, but a deliberate alternative to its successor. Cal. 2231 examples from 2014 onward are the stronger technical choice — especially for buyers who don't want to give up the Parachrom hairspring and Paraflex shock protection.
Brand profile: Rolex
Rolex is the most counterfeited watch brand in the world. Super-clones (VSF, ARF, Clean — the latter inactive after a raid in 07/2025, only old stock remaining) achieve 95%+ similarity. Authenticity is almost always detectable only via micro-details + movement behavior.
- Case back: ALWAYS solid and closed — any display window = definitely fake (exception: Vintage Ref. 6085 only)
- Minute hand length: genuine Rolex minute hands end EXACTLY at the minute chapter ring. 1 mm too long = fake. Strongest VSF tell.
- Seconds hand: smooth sweep without any hesitation — the slightest tick = fake
- Cyclops lens (on date models): must magnify exactly 2.5×, date fills almost the entire window
Serial number format: Since 2010: random alphanumeric combination (e.g. 'G3M9K721'). 2000–2010: letter + 6–7 digits. Serial number engraved on the rehaut at 6 o'clock (from ~2005). Older models: between the lugs at 6 o'clock on the case.
Further sources
Buying guide: Rolex Lady Oyster Perpetual
Entry into Rolex
At $6,172 this reference is one of the more affordable ways to wear a Rolex on your wrist. That is precisely why many pieces have already passed through several hands — condition varies accordingly. Buyers here should pay particular attention to service history and honest photos from the seller.
Watch out for swings: This reference has an above-average volatility of 35.6 percent. In concrete terms: the price can move by several hundred euros within a few weeks. Check the current value before buying or selling — old listings or auction results from two months ago are of little help.
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 Rolex Lady Oyster Perpetual 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 Lady Oyster Perpetual.
- 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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