IWC Portofino Automatic
+122 % 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
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.
IWC Ref. IW356504 — Variants and collector names
Known as: Portofino 40 Rotgold, Portofino Automatic Rose Gold, Portofino 5N Gold
Production phases and changes
- 2016: Reference format rename IW3565-04 → IW356504 (5-digit to 6-digit), simultaneously caliber standardization to Cal. 35111
Movement variants
- 35111 (2016–today) · 28800 bph
Bezel variants
- IW356504-Bezel-RG-Fixed
Dial variants
- IW356504-Dial-Silver — Silver-galvanised, applied rose gold baton indices, Roman numerals at 6 and 12 o'clock, date window at 3 o'clock, 'IWC Schaffhausen' at top, 'Automatic' at bottom
Crystal variants
- IW356506-Saphir-AR-Konvex
Bracelet variants
- Dunkelbraunes Alligatorleder, 20 mm Ref. IW356504-Strap-Brown-Alligator-20mm
The IW356504 is the product of something mundane — a reference format change. In 2016, IWC migrated its entire lineup to six-digit reference numbers, turning the IW3565-04 (in production since around 2011) into the IW356504. Nothing changed on the case: 40 mm, 5N rose gold, the classic Portofino dial without a moment's design disruption. Anyone spotting both references on the market is looking at the same watch under two naming generations.
## The caliber behind it — and why it matters
Alongside the renaming, IWC standardized the movement to Calibre 35111. This is the in-house finished version of the Sellita SW300-1, with additional refinements to the rotor and regulation compared to the predecessor Calibre 35110. For the wearer, that translates to 42 hours of power reserve at 28,800 vph — enough for a long weekend off the wrist. The Portofino line was never a stage for technical superlatives; Calibre 35111 delivers exactly what the aesthetic demands.
## Market: rose gold between collector niche and liquidity question
Among collectors, the IW356504 goes by the nickname "Portofino 5N Gold" — the moniker points to the specific rose gold alloy IWC uses for this reference. The precious-metal case narrows the buyer pool, which measurably constrains trading liquidity compared to the steel version. Anyone looking to sell needs patience; the market for precious-metal Portofinos is modest, but demand is stable — especially since the rose gold revival at AP and Patek from 2022 onward.
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 Automatic
Market situation and price range
At $13,419 the Portofino Automatic 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 IWC Portofino Automatic 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 Automatic.
- 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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