IWC Portofino Hand-Wound
+221 % 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
IWC Ref. IW544805 — Variants and collector names
Known as: Vintage Portofino Platinum, Portofino Moonphase Platinum, Portofino 140th Anniversary Edition, Portofino Limited 500
Movement variants
- 98800 (?–today) · 18000 bph
Bezel variants
- IW544805-Bezel-Pt950-Fixed
Dial variants
- IW544805-Dial-Silver-BlueRoman-Moon — Blue Roman numerals, IWC Schaffhausen signature, moonphase aperture 12h, small seconds 6h, Breguet hands, no date
Crystal variants
- IW544805-Saphir-AR-Doppel-Caseback
Bracelet variants
- Alligator Schwarz Ref. IW544805-Strap-Alligator-Schwarz-20mm
The IWC Portofino Moonphase Platinum reference IW544805 belongs to a limited edition of 500 pieces, released to mark the 140th anniversary of the manufacture in Schaffhausen. Anyone who comes across this reference at dealers or auction houses sees almost the same picture every time: a 950 platinum case with a fixed bezel, no interchangeable options, no material variants. That consistency makes identification straightforward in day-to-day work — if the precious metal stamp is wrong, the weight won't match up either.
## The Dial Reveals the Manufacture's Signature
Silver dial, blue Roman numerals, moon phase display at 6 o'clock — this layout, internally coded Silver-BlueRoman-Moon, doesn't appear on any other Portofino reference in exactly this combination. During an appraisal, this is my fastest check: if the blue of the numerals deviates from IWC's standard shade, that's a red flag before I've even opened the case back.
## Caliber 98800 at the Core
The IW544805 is powered by Caliber 98800, a hand-wound movement with moon phase complication that IWC uses across several Portofino lines. When assessing value, I check the condition of the moon phase mechanism first, since a repair to this component can easily run into four figures.
## Why Collectors Seek Out This Reference
Among collectors, the IW544805 also goes by Vintage Portofino Platinum or Portofino 140th Anniversary Edition. 500 pieces from a brand with a history spanning more than 140 years make for a quiet but stable secondary market. It's precisely with a reference like this that a verified market value analysis pays off before buying, since supply and actual demand rarely line up neatly.
Brand profile: IWC
IWC Schaffhausen produces high-quality pilot and sports watches. The Portugieser, Pilot's Watch (Big Pilot + Mark XVIII/XX), and Portofino are the most frequently faked references. Since 2025, APS Factory V3 has produced integrated 52010 super-clones with correct case thickness — classic tells (case thickness, movement visibility) are only partially reliable against these. Key checks today: engraving depth, seconds tick interval, thermally blued hand color, and sub-dial proportions.
- Serial number: genuine IWC serials are 6 digits, purely numeric, on the caseback — all serial numbers are verifiable in the IWC 'My IWC' portal. Fakes often have 7 digits or a mix of letters and numbers.
- Portugieser sub-dial seconds intervals: a GENUINE piece has exactly 3 mini-ticks between each seconds index (high beat rate of 28,800 vph) — fakes have 4 or irregular ticks (lower beat rate).
- Caseback engraving 'International Watch Company': genuine engraving is DEEP (perceptible with a fingernail) and sharp-edged — fakes are shallower, sometimes just laser-printed rather than truly engraved. Test: raking light and a loupe.
- Portugieser/Portofino blue hand color: thermally blued steel shifts from deep blue to light violet depending on viewing angle — painted fake hands show a flat, uniform blue.
Serial number format: IWC serial numbers: 6-digit numeric on the caseback. Verifiable online via the IWC My IWC Portal.
Further sources
Buying guide: IWC Portofino Hand-Wound
Market situation and price range
At $18,190 the Portofino Hand-Wound 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.
Watch out for swings: This reference has an above-average volatility of 102.3 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 IWC Portofino Hand-Wound 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 Portofino Hand-Wound.
- 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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