The IWC Portugieser Automatic Ref. IW500705 pairs a 42.3 mm stainless-steel case with a silver-plated dial, black alligator leather strap and IWC-manufactured calibre 52010. Its defining practical feature is a power-reserve display for the stated seven-day reserve when fully wound. The published specifications make it a substantial, traditional-looking automatic watch; they do not establish how it fits, keeps time or feels on the wrist.
What the IWC Portugieser Automatic IW500705 is
IWC’s catalogue identifies Ref. IW500705 as a stainless-steel Portugieser Automatic with a silver-plated dial and black alligator leather strap. The design combines a date display and power-reserve indicator with small seconds, while a sapphire display back exposes the movement. These are exact-reference specifications, rather than details inferred from a visually similar Portugieser.
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CITIZEN Men's Automatic Tsuyosa 40mm Stainless Steel NJ0150-56X | $346.64 | Buy on Amazon |
The model is often described as a “7-Day” Portugieser because IWC states a seven-day power reserve when fully wound. That figure is the manufacturer’s specification, not a guarantee that every example will run for exactly seven days in all conditions.
IW500705 specifications
| Specification | IWC catalogue listing |
|---|---|
| Reference | IW500705 |
| Case material | Stainless steel |
| Case diameter | 42.3 mm |
| Case height | 14.2 mm |
| Dial | Silver-plated |
| Strap | Black alligator leather |
| Movement | IWC-manufactured calibre 52010, mechanical with Pellaton automatic winding |
| Power reserve | Seven days when fully wound; power-reserve display |
| Displays and functions | Date display, power-reserve display and small hacking seconds |
| Other movement details | Breguet spring; rotor with an 18-carat gold medallion |
| Crystal | Convex sapphire glass with anti-reflective coating on both sides |
| Case back | See-through sapphire glass |
| Water resistance | 3 bar, as published by IWC |
All measurements, movement details and ratings in the table are IWC catalogue specifications for IW500705; they are not independent test results. IWC’s IW500710 catalogue page describes a different reference. Shared details such as calibre 52010 or a 42.3 mm diameter do not make the two references interchangeable.
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- The "Tsuyosa" Automatic, from the NJ015 series, brings ultramodern sports styling right to your wrist. Executed in a versatile 40mm footprint, the sophisticated design of the watch makes a strong impression via a silver-tone stainless steel case and a seamlessly integrated, matching bracelet.
- . Underneath an anti-reflective sapphire crystal, the sporty timepiece makes use of a sunray green dial, with a 3 o’clock date window and contrasting silver-tone details adding to its classic aesthetic. Powered by an automatic movement and offering up to 50 meters of water resistance, the refined timepiece is a daily wearing choice ready for work, play, and everything in between. Caliber 8210.
- 3 Hand with Date, Automatic, 42 Hour Power Reserve
- Sapphire Crystal
- 50M Water Resistant and 5 Year Limited Warranty
Dial layout and case: the appeal and the fit questions
The silver-plated dial, date, power-reserve display and small seconds give the IW500705 a more information-rich face than a simple two-hand dress watch. The reserve indicator is especially useful for an automatic watch with a long stated reserve: it lets the wearer check the remaining reserve rather than relying only on how long the watch has been off the wrist. The catalogue specifies convex sapphire crystal with anti-reflective coating on both sides, but that does not by itself establish how legible the dial will be in every lighting condition.
A 42.3 mm diameter and 14.2 mm height are substantial published dimensions for a watch with a traditional Portugieser presentation. Those numbers can help narrow a fit decision, but they cannot settle it: lug-to-lug length is not established here, and wrist shape, strap adjustment and personal preference all matter. Try the watch on if possible, and assess how the case sits from above and in profile rather than judging by diameter alone.
Calibre 52010 and the seven-day reserve
IWC identifies the movement as its manufactured calibre 52010, with Pellaton automatic winding. The catalogue states a seven-day power reserve when fully wound and includes a display of remaining reserve. In ordinary use, that display makes it easier to see whether the watch has substantial reserve left or is approaching the end of its run; actual running time should not be treated as identical for every watch or wearing pattern.
The listed date display and small hacking seconds add everyday setting functions. “Hacking” means the seconds hand stops when the crown is pulled to the setting position, allowing more precise synchronization while setting the time. IWC also lists a Breguet spring and a rotor carrying an 18-carat gold medallion. These are manufacturer-listed movement details, not evidence here of a particular accuracy result, service interval or service cost.
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IWC lists water resistance at 3 bar. Treat that as the published rating, not as evidence that this particular watch is suitable for swimming or diving. The catalogue specification alone does not supply activity guidance; confirm any intended water exposure with IWC’s documentation for the watch and its current condition.
The black alligator leather strap is part of the reference’s specified configuration. A buyer considering a replacement strap should verify fit and compatibility for the exact watch rather than assume any strap of a similar width will work.
What to check before buying an IW500705
Price, live stock, service history and marketplace terms vary by seller, region and condition, and no current listing or price is established here. For a new or pre-owned example, use the reference number and physical condition—not a broad “Portugieser 7-Day” label—as the starting point for verification.
- Confirm that the watch is Ref. IW500705; related Portugieser references can share prominent specifications while differing in reference-specific details.
- Inspect condition and ask for service history, along with any available documentation, box and papers.
- Review the seller’s written warranty, return terms and any authentication process before purchase.
- For a pre-owned example, have a qualified watchmaker assess its condition if the purchase decision depends on mechanical performance or service needs.
No specific current IWC service recommendation or typical calibre 52010 servicing cost is established here, so ask IWC or a qualified provider for guidance on the individual watch.
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Who should consider the IW500705?
The IW500705 is worth considering for someone drawn to a large, steel Portugieser with a multi-function dial, a display back and a long stated reserve with an indicator. Its published dimensions, 3-bar water-resistance rating and alligator strap also make it a watch to assess carefully against personal fit and intended use rather than assume it is an all-purpose choice. A wrist try-on and exact-reference inspection will answer questions the catalogue cannot.
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