Grand Seiko Heritage 36.5mm Unisex Watch Purple
+12 % above 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
Brand profile: Grand Seiko
Grand Seiko is Seiko's premium manufacture brand (2,000-50,000+ EUR), independent since 2017. The most commonly counterfeited pieces are the Snowflake SBGA211, Spring Drive GMT and Heritage models. The main risk comes from mid-tier replicas with incorrect finishing and imitation Spring Drive mechanisms.
- Spring Drive glide motion: on genuine GS watches with Spring Drive, the seconds hand glides absolutely smoothly with no ticking (8 steps/second visible = fake with a high-beat movement)
- Zaratsu polishing: case surfaces must be mirror-smooth with no distortion, with sharp edges between polished and brushed surfaces; fakes show waviness, orange-peel texture or blurred transitions
- Indexes: Grand Seiko indexes have diamond-cut facets with perfect light reflections; fakes show dull, blunt edges or uneven faceting
- Logo precision: the 'Grand Seiko' lettering must be printed razor-sharp; fakes show blurry edges, the wrong typeface (too thick/thin) or incorrect spacing
Serial number format: 6 digits engraved on the case back. First digit = production year (last digit), second digit = month (1-9, X/Y/Z for Oct/Nov/Dec). The engraving must be deep, precise and even. Fakes often show engravings that are too shallow and laser-etched, with blurry edges or the wrong font.
Further sources
Buying guide: Grand Seiko Heritage 36.5mm Unisex Watch Purple
Entry into Grand Seiko
At $6,210 this reference is one of the more affordable ways to wear a Grand Seiko 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.
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 Grand Seiko Heritage 36.5mm Unisex Watch Purple 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 Heritage 36.5mm Unisex Watch Purple.
- 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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