Name: IWC Portugieser Automatic (7-day) IW500712
Brand: IWC
SKU: IW500712

The Portugieser Automatic 7-day (ref. IW500712) is IWC's flagship dress watch, 42.3mm, the in-house caliber 52010 with a 168-hour (seven-day) reserve, Arabic numerals, leaf hands, and the railway-track minute ring that defines the design. The 'Portuguese' style traces to a 1939 commission from two Portuguese merchants who asked IWC for a wristwatch with marine-chronometer accuracy; the modern Automatic 7-day is the closest contemporary expression of that brief.

What it is

IWC introduced the Portuguese line in 1939 (refs 325 and 528) for Rodrigues & Gonçalves of Lisbon. The line returned to regular production in 1993 (the F.A. Jones limited-edition followed by the 'Original' Portuguese), and the Automatic 7-day arrived in 2000 with the in-house caliber 5000 (later refined to 51011 and 52010).

The current IW500712 generation (2020 onwards) carries the caliber 52010 with twin barrels, Pellaton automatic winding (a hammer-and-pawl system specific to IWC), and the seven-day reserve. Dial colors include silver, blue, black, and rotating limited-edition green and slate variants.

Buying notes

Common things to check: case-material verification (steel vs rose gold price differs substantially, verify hallmarks on the case-back); dial originality (the railway-track minute ring is heavily-copied but the printing depth is subtle, service-replaced dials often have softer print); Pellaton-winding system (the hammer-and-pawl mechanism on the caliber 52010 is robust but the ceramic components in modern revisions are not field-serviceable, verify service history); papers (a 7-day Portugieser without papers is sellable but at a discount to a papered equivalent); the case has subtle differences across production years (lug-tip profile, crown-guard absence). Match the case to the production date.

Market read

Steel 7-day Portugieser examples trade in the $9,500-$12,500 range pre-owned, against a current retail of approximately $15,000. The 'Portugieser' line is one of the better-priced large dress watches at this caliber-grade, competitively positioned against the Aqua Terra GMT and the Portugieser Chronograph at the IWC top end. Rose-gold variants trade meaningfully higher.

The Portugieser has not seen 2021-2022-style speculation; the market is steady and predictable.

Service expectations

Service is performed by IWC and select IWC-authorized independents. Expect 4-6 month turnaround and a low-four-figure service bill. The Pellaton winding system in the caliber 52010 is robust but the ceramic components introduced in the 2018+ revision are not interchangeable with older steel components, a 7-day Portugieser with a known service history is meaningfully more useful to a buyer than one without.

Service interval is 5-7 years.

Editorial copy is AI-drafted from primary sources and reviewed by Grail Atlas before publication. Where the text is uncertain about a fact, it says so. Email corrections@grailatlas.com if something reads wrong. Signals on this page (community, OSINT) are clearly separated from the editorial sections.

The reference that revived collector interest in the Portugieser family; seven-day power reserve and in-house movement at a dress-watch footprint.

Mass-producedmost sought#1 in familyOfficial press photos

Condition affects price

Pre-owned watches trade across a wide condition spectrum. These ranges are typical for the secondary market.

New Old Stock

Unworn example retaining original packaging, tags, and warranty documentation.

+30–50% vs median

Unpolished

Worn but the case has never been polished; original brushed and polished surfaces are intact.

+15–25% vs median

Polished

Case has been professionally or amateur polished at some point; edge definition is softened.

-15 to -5% vs median

Recently Serviced

Movement has been recently serviced with documented service records; case condition varies.

At median

Project

Needs service, has dial or hand issues, non-original parts, or other remediation before daily wear.

-50 to -25% vs median

Full condition grading guide →

Market price

$9,000–$13,000

steel·2026 Q2

Price trend chart coming soon

The 7-Day Power Reserve Portugieser is the defining large-dress-sport watch in the IWC lineup; in-house movement and distinctive reserve display justify its premium over the standard Portugieser.

Editorial estimate, 2026 Q2. Actual prices vary by condition, date, and box/papers status.

Movement tier: unclassified · caliber IWC Cal. 52010: in-house automatic, 21,600bph, 168h (7-day) PR, 42j; twin mainspring barrels, pellaton winding system; used in Portugieser 7-Day · 168h power reserve (7 days)

Large case: suits wrists 7 in+ (18 cm+)

42.3 mm case. A bold, statement-size wear. Best suited to larger wrists where the case sits flush.

Not yet rated

Community + OSINT signals haven’t landed for this reference yet. We don’t publish a rating against zero signal: the number would mean nothing. Editorial body + caliber + market value still surface above; ratings appear once the signal corpus does.

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Authentication

Seven-day power reserve display on the dial and correct Cal. 5101 (or earlier 5000/98295) signing authenticate the IWC Portugieser 7-Day

Known issues in the market

Earlier references used modified pocket-watch-sized movements (Cal. 98295 or Cal. 5000) before the in-house Cal. 5101
Power reserve must span 7 days; verify by winding fully and running down with a timer
Large case (42mm or 44mm) and exhibition caseback are standard; solid caseback indicates an issue

Area	What to check	What is correct	Red flag
dial	Seven-day power reserve display	Power reserve indicator scaled to 7 days on subsidiary dial or arc; "7 Days" or "168 hours" text per variant; "IWC Schaffhausen" and "Portugieser" text; Arabic numerals consistent with Portugieser design language	Power reserve scale shorter than 7 days; missing power reserve display; dial text inconsistent with documented Portugieser Automatic (different reference without 7-day reserve)
movement	Cal. 5101 or earlier calibre	"Cal. 5101" (current) or "Cal. 98295 / 5000" (earlier) on movement; large-diameter movement architecture derived from pocket-watch sizing; exhibition caseback standard; "IWC" signed; hand-finish quality consistent with IWC standard	ETA-based movement in a claimed 7-day Portugieser; power reserve mechanism absent; calibre inconsistent with documented production years
case	42mm or 44mm large pilot-adjacent case	42.3mm or 44mm diameter per production year; slim bezel; exhibition caseback; crown at 3 without crown guards; sapphire crystal with anti-reflection coating; "IWC" on crown	Solid caseback on exhibition variant; case diameter inconsistent with documented 7-day Portugieser spec; crown guards present

Common legitimate replacements

Leather strap with pin buckle is OEM standard; alligator options are factory; aftermarket replacement common.
Large exhibition caseback allows movement assessment without service; verify caseback sealing is intact.

Expert resources: IWC Schaffhausen service centers for serial verification. Watchuseek IWC forum and Hodinkee IWC coverage document 7-day Portugieser calibre transitions.

Authentication guide

Last reviewed June 2026

The IWC Portugieser Automatic 7-Day is less frequently replicated than Rolex or AP but commands enough secondary value that movement confirmation and dial authenticity are worth verifying carefully.

Known reproduction risks

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MEDIUM

Replica watches targeting the Portugieser 7-Day with generic movements substituted.

Sub-seconds register at 6 o'clock rather than the correct 9 o'clock position
Power reserve indicator that does not track correctly or has incorrect scale markings
Exhibition caseback showing a non-IWC movement architecture without the prominent barrel
"IWC SCHAFFHAUSEN" text with font weight or character spacing inconsistent with known IWC production

LOW

Authentic-case watches with movement swaps from other IWC generations.

Power reserve less than seven days on a fully wound watch -- indicates a non-7-day movement has been installed
Movement visible through caseback without the characteristic Pellaton winding architecture

Dial variants by era

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Era	Description	Identifiers
2003 to present (silver or white dial)	Silver argenté or white dial with Roman numeral chapter ring and Portugieser-specific sub-seconds at 9.	Applied Roman numeral chapter ring with correct proportions for each numeral position Sub-seconds register at 9 o'clock (not at 6) -- distinguishes the Portugieser from many other IWC three-handers 7-day power reserve indicator at 3 o'clock with correctly graduated scale "IWC SCHAFFHAUSEN" text printed in the correct IWC Portugieser typeface below 12 Skeleton-style open worked chapter ring showing the dial surface between the chapter ring and the markers

Service part flags

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Power reserve indicator

Original: Seven-day power reserve sector at 3 o'clock with a pointer indicating reserve level. The scale should read correctly from full (7 days) through empty. The pointer must track accurately through the full wind cycle.

Replacement tells

Power reserve pointer that does not track correctly through a full wind cycle
Incorrect scale markings or incorrect pointer profile for the 5001 specification
Power reserve scale positioned at a different location than 3 o'clock -- non-standard position indicates a dial substitution

Sub-seconds register

Original: Sub-seconds at 9 o'clock on a small disc with a sweep seconds hand. The position at 9 is the defining Portugieser layout.

Replacement tells

Sub-seconds register at 6 o'clock rather than 9 -- indicates the wrong dial or a different IWC reference
Register disc with incorrect color or finish inconsistent with the main dial tone

Alligator strap

Original: IWC ships the 5001 on a genuine alligator strap with a pin buckle or deployment clasp bearing the IWC logo.

Replacement tells

Non-IWC buckle markings on the original hardware
Strap that does not match the known alligator pattern and finish for this reference

Case back markings

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2003 to present

Exhibition caseback showing Cal. 51011 (in-house IWC caliber)
"IWC SCHAFFHAUSEN" engraved on the caseback in correct IWC typeface
Reference 5001 and serial number engraved on the case band
Swiss hallmarks for stated case material
Seven-day power reserve indicator visible through the caseback as the mainspring barrel

Movement tells

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Cal. 51011 is the IWC in-house 7-day movement. The movement is visible through the exhibition caseback. The mainspring barrel is prominent and shows the reserve level directly.
Seven-day power reserve test: fully wind the crown and verify that the power reserve indicator reads full. Then leave the watch unworn and confirm it runs for approximately seven days before stopping.
Pellaton winding system: Cal. 51011 uses the IWC Pellaton automatic winding system with ceramic parts. The winding action should feel smooth and efficient with a distinct Pellaton character distinct from standard ball-bearing rotors.
Non-IWC movements (ETA 7750 or similar) are occasionally swapped into Portugieser cases. A non-IWC movement will show a different bridge architecture and will lack the prominent barrel visible in the genuine Cal. 51011.

Sources: IWC Forum (IWCforum.org) -- Portugieser authentication and caliber documentation; WatchUSeek IWC subforum -- 5001 production variant threads; IWC Schaffhausen customer service -- serial verification and Extract of the Archives.