Rolex Datejust 36
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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
Lift angle 52° — important for timing-machine diagnosis: with this value a watchmaker can correctly measure rate deviation, amplitude and beat error. ChronoCheck verifies such technical details directly from the manufacturers' factory specifications.
Rolex Ref. 1600 — Variants and collector names
Known as: Smooth DJ, Pie-Pan 1600, Four-Digit Datejust, Wide Boy, Sigma Pie-Pan
Production phases and changes
- 1959: Introduction of Ref. 1600 as smooth-bezel Datejust with Cal. 1560/1565
- 1963: Lume change: Radium → Tritium
- 1965: Movement change from Cal. 1565 to Cal. 1575 (19,800 bph)
- 1972: Cal. 1575 gains hacking (seconds stop)
- 1977: Ref. 1600 superseded by Ref. 16000
Movement variants
- 1560 (1959–1965) · 28800 bph
- 1570 (1965–1977) · 28800 bph
- 1575 (1965–1977) · 28800 bph
Bezel variants
- Smooth Steel Bezel "Plain Bezel / Smooth Bezel"
Dial variants
- Swiss Only Gilt Chapter Ring — EXPLORER (gilt) / OYSTER PERPETUAL / Superlative Chronometer / 'Swiss' below 6h / Chapter Ring
- Black Pie-Pan — ROLEX / OYSTER PERPETUAL / DAY-DATE
- Silver Pie-Pan — ROLEX / OYSTER PERPETUAL / DAY-DATE
- Wide Boy — ROLEX / OYSTER PERPETUAL / DAY-DATE
- Sigma Linen — ROLEX / OYSTER PERPETUAL / DAY-DATE / σ T SWISS T σ
Crystal variants
- Plexi 25-127 (Top Hat)
Bracelet variants
- Jubilee Ref. 62510H
- Jubilee Folded Link Ref. 6251H
- Oyster Folded 3-Link (19mm) Ref. 7835
Serial numbers
- 399,000 – 985,014 (1959–1963) — REUSED range: numbers were reassigned after the 1954 reset. Use caseback date codes for precise verification. Serial number is located between the lugs at 6 o'clock (remove bracelet).
- 985,015 – 1,553,999 (1964–1967) — Transition range Cal. 1565 → Cal. 1575. Movement change to Cal. 1575 from approx. SN 1.2M–1.4M. Radium → Tritium transition approx. 1963.
- 1,554,000 – 2,890,000 (1967–1972) — Main production phase with Cal. 1575 (without hacking). Auction evidence: SN 1.632.280 = approx. 1967, SN 1.745.026 = approx. 1968, SN 2.395.582 = approx. 1970.
- 2,890,000 – 5,008,000 (1972–1977) — Late phase with Cal. 1575 + hacking (from approx. 1972). Wide-Boy and Sigma-Dials dominant. Auction evidence: SN 4.034.380 = approx. 1975. Superseded by Ref. 16000 with Cal. 3035.
In 1959, the Ref. 1600 stepped in to replace its four-digit predecessor generation. The 36mm Oyster case with Cyclops magnifier and pie-pan dial defines to this day what collectors mean by "Smooth DJ." The plain bezel was no cost-cutting measure — it was a deliberate design statement: the Ref. 1600 came exclusively with a smooth steel bezel, while its sister variants 1601 and 1603 wore fluted or gold-toned bezels. Powered by Calibre 1560 or 1565, it ran at 18,000 alternations per hour, still without a hacking seconds function at this stage.
## Three Movement Generations in 18 Years
Around 1965, Rolex transitioned to Calibre 1575, raising the beat rate to 19,800 alternations per hour — a gradual changeover during which some rotor bridges still carried a "1570" stamp. As early as 1963, Rolex had replaced radium with tritium as the luminous material; from that point onward, dials carry the "T Swiss T" designation. In 1972, Calibre 1575 gained a hacking seconds function, bringing the sweep hand to a standstill when the crown is pulled. Anyone who needs to set the time to the exact second should look for serial numbers from approximately 2.3 million onward.
## Why the Dial and Serial Number Drive the Price
Four dial variants are most sought after among collectors: the Gilt Chapter Ring with its "Swiss Only" text from the transitional period up to 1963, the Wide-Boy Pie-Pan with its broad minute track, the Sigma Linen Dial of the early 1970s, and the classic silver or black Pie-Pan. A Gilt Chapter Ring in top condition commands 30 to 40 percent more today than a standard dial in equivalent condition. Production wrapped up in 1977 with the shift to the five-digit Ref. 16000 — anyone after a genuine four-digit DJ has been working within a strictly finite window ever since.
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 Datejust 36
Entry into Rolex
At $5,658 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 58.6 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 Datejust 36 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 Datejust 36.
- 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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