IWC Portofino Automatic
4 % 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.
What if you had bought back then …
What would a purchase at the median market price back then have become — at today's level of $5,046. A pure return calculation, excluding insurance, servicing and transaction costs.
Data from an aggregated median time series (watch_market_daily). CAGR = Compound Annual Growth Rate, normalized to 365 days. Not an investment recommendation.
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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. IW356501 — Variants and collector names
Known as: Portofino 40, PF Auto, Portofino Three-Hand
Production phases and changes
- 2011: Introduction of IW356501 as the third Portofino generation; replacement of ETA-based calibers with Sellita-based Cal. 35111
Movement variants
- 35111 (2011–2023) · 28800 bph
Bezel variants
- IW356506-Bezel-SS-Fixed
Dial variants
- IW356501-Dial-Silver-Roman-Date — IWC SCHAFFHAUSEN above / AUTOMATIC below / XII + VI Roman / baton indices / date at 3h / no lume
Crystal variants
- IW356506-Saphir-AR-Konvex
Bracelet variants
- Milanaise Mesh Ref. IW356506-Milanaise-SS-20mm
- Alligator Schwarz Dornschließe Ref. IW356501-Strap-Black-Alligator-20mm
The IWC Portofino IW356501 made its debut at SIHH in Geneva in January 2011 — as part of a completely redesigned Portofino family. IWC standardized the case to 40 mm and replaced the ETA-based calibers of the predecessor references IW356302 and IW356303 with the new Cal. 35111. Collectors know the watch as the "Portofino 40," while forum threads also surface "PF Auto" and "Portofino Three-Hand" depending on context — always the same reference.
## Cal. 35111: Sellita Foundation, Built to IWC's Spec
The movement comes from Sellita — specifically the SW300-1 — manufactured to IWC's specifications. Power reserve is 42 hours, beat rate 28,800 A/h. The move to Sellita in 2011 was far from an IWC-exclusive decision; several Swiss manufacturers parted ways with ETA as an ébauche supplier during this period. The result is a dependable automatic movement that IWC has regulated and inspected under its own name.
## The Case: Stainless Steel, No Surprises
The stainless steel case measures 40 mm in diameter and features a fixed bezel — no rotating element, no decorative inlays. The dial layout follows the pared-back Portofino ethos: applied hour indices, a clean hour display, nothing extraneous. Water resistance is rated to 30 metres, which sits well within the accepted standard for a dress watch in this category. For anyone looking for a genuine entry point into the IWC world, this reference has delivered no fundamental surprises since 2011.
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
Entry into IWC
At $5,046 this reference is one of the more affordable ways to wear a IWC 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.
Where the price stands
The price has fallen by -11.7% over the past four months. No crash, but a clear downward trend. Buyers currently have room to negotiate; sellers are better off waiting for the market to bottom out — unless they have to sell.
Watch out for swings: This reference has an above-average volatility of 86.6 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 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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