Widths differ across this line. Enter or pick your exact reference to get its width.
18 to 22 mm
Verification: Listed by the maker for ref. IW503704, IW501708 and 3 more
Attachment: spring bars
35 to 46.2 mm cases · 1954 to 2026
Official page: IWC
Report an errorIndicative information. Check your watch before buying a strap: whatsmylugwidth.com is not responsible for an incorrect size.
The story · Since 1939
1,750
pieces of the 1993 Anniversary Edition: 1,000 steel, 500 gold, 250 platinum
Worn by
For IWC's 125th anniversary, marketing and sales director Hannes Pantli reissued Reference 325 as a small limited series and named it the Portugieser. The Ref. 5441 came in 1,000 steel, 500 gold and 250 platinum pieces with the calibre 9828, sold out quickly and, says IWC, set off a global trend towards larger wristwatches.
The Portugieser returned in 1995 as the Rattrapante Ref. 3712, followed in 1998 by the simpler Chronograph Ref. 3714. In 2000 came the first Portugieser Automatic, whose design IWC still calls the DNA of today's Automatic 42.
In 2003 Kurt Klaus's perpetual calendar entered the family with the Ref. 5021, its moon phase needing a one-day correction only after 577.5 years. In 2010 IWC folded its 1967 Yacht Club name into the line with the 45 mm Portugieser Yacht Club Chronograph Ref. 3902, drawn by chief designer Christian Knoop.
After 22 years, the 3714 gave way on 3 February 2020 to the Ref. 3716, with the same face, the in-house column-wheel calibre 69355 behind a see-through back and a new butterfly folding clasp on steel models. The same year the time-only Portugieser Automatic 40 joined the collection.
On 9 April 2024 IWC re-engineered the Portugieser Automatic 42 with a slimmer case, double box-glass sapphires and a seven-day calibre 52011. That November the Portugieser Eternal Calendar won the Aiguille d'Or, the top prize of the Grand Prix d'Horlogerie de Geneve.
Wore a steel Portugieser Annual Calendar, Ref. IW503502, with a sunburst blue dial at the world premiere of Netflix's Red Notice in Los Angeles on 3 November 2021.
Presented an award at the 2021 Emmys wearing an IWC Portugieser Automatic.
Wore an IWC Portugieser to the Tribeca Film Festival, as Time and Tide recalls; no reference or year given.
2024. On 13 November 2024 the Portugieser Eternal Calendar won the Aiguille d'Or Grand Prix at the 24th GPHG.
1993. The watch had no name until 1993: IWC chose Portugieser to recall the two Portuguese dealers behind Reference 325 and to evoke navigation and precision.
1939. Despite its name, the first Reference 325 left Schaffhausen on 22 February 1939 for L. Schwarcz, a Ukrainian wholesaler in Odessa. The first watches reached Portugal only in February and June 1942.
Developed the perpetual calendar mechanism in the 1980s and reworked it from the ground up for the calibre 5000 of the Portugieser Perpetual Calendar.
IWC says its chief designer Christian Knoop created the Portugieser Yacht Club Chronograph, a nautical sports watch in a 45 mm case.
The Portugieser Eternal Calendar, a secular perpetual calendar with a 400-year gear, won the GPHG Aiguille d'Or Grand Prix on 13 November 2024.
Slimmer re-engineered case, double box-glass sapphire, calibre 52011 with seven days of reserve in two barrels.
42.4 mm case takes a 22 mm strap with an 18 mm buckle (IW501701), unlike the 20 mm chronograph.
A secular perpetual calendar with a 400-year gear accurate until 3999 and a Double Moon display that deviates by a day only after 45,361,055 years; winner of the 2024 Aiguille d'Or.
Same face as the 3714 on a 41 mm by 13.1 mm case, now with the in-house calibre 69355 and a 46-hour reserve visible through the back.
IWC lists 20 mm strap width and 18 mm buckle width for current 3716 references (IW371620, IW371626, IW371631); steel models got a new butterfly folding clasp.
A 40 mm time-only Portugieser with small seconds at 6 and no date, which IWC places in direct lineage of the Ref. 325; calibre 82200 with 60 hours.
40.4 mm case, 20 mm strap width, 18 mm buckle (IW358402).
Christian Knoop's sporty Portugieser: 45 mm, 6 bar water resistance and the calibre 89360, which shows stopped hours and minutes in one totalizer at 12.
45 mm case.
First Portugieser with Kurt Klaus's perpetual calendar, reworked for the large calibre 5000, with a moon phase off by one day only after 577.5 years.
The first Portugieser Automatic, which IWC lists as Ref. IW50001 and names as the model whose DNA the 2024 Automatic 42 keeps.
Ref. 3714 Chronograph: A bestseller for 22 years, powered by the calibre 79350 derived from the Valjoux 7750.
Case 40.9 mm by 12.6 mm.
A split-seconds chronograph with which the Portugieser made its return in 1995.
Hand-wound hunter pocket calibre 74 in a 41.5 mm case, small seconds at 6 and slim feuille hands. Never shown in an IWC catalogue of its time.
IWC Portugieser references in our database. Each card says where its width comes from: listed by the maker (linked to the maker's page in the details), two independent sources agree, or listed in our database and not yet verified by us.
Portugieser 325 Vintage
Lug width: 18 mm
Source: Not yet verified Attachment: Spring barsCase size: 35 mmYear: 1954Silver dialCase material: Steel
Portugieser 3714 Early
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmYear: 1998Silver dialCase material: Steel
Portugieser 3714 Blue
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmYear: 2000Blue dialCase material: Steel
Portugieser Laureus Portugieser Chronograph
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmYear: 2016Blue Laureus dialCase material: Steel
Portugieser 150 Years Blue
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmYear: 2018Blue Lacquer dialCase material: Steel
Portugieser 150 Years White
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmYear: 2018White Lacquer dialCase material: Steel
Portugieser Chronograph
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmYear: 2021Blue Laureus dialCase material: Steel
Portugieser Chronograph 41 Ceratanium
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmYear: 2026Black dialCase material: Steel
Portugieser Automatic 40
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 44.4 mmGreen dial
Portugieser Automatic 40
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 40.4 mmBlack dial
Portugieser Automatic 40
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 40.4 mmGrey dial
Portugieser Automatic 42
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 42.4 mmBlue dial
Portugieser Automatic 42
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 42.4 mmBlue dial
Portugieser Automatic 42
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 42.4 mmBlue dial
Portugieser Automatic 42
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 42.4 mmBlue dial
Portugieser Chronograph
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmBlack dialCase material: Stainless steel
Portugieser Chronograph
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 41 mmDune dialCase material: Stainless steel
Portugieser Chronograph
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmBlack dialCase material: Stainless steel
Portugieser Chronograph Year of the Dragon
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmPurple / Bordeaux dialCase material: Stainless steel
Portugieser Eternal Calendar
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44.4 mmGrey dial
Portugieser Grande Complication
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 45 mmWhite dial
Portugieser Grande Complication
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 45 mmWhite dial
Portugieser Hand-Wound
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44 mmBlack dial
Portugieser Hand-Wound Tourbillon Day & Night
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44.2 mmBlack dial
Portugieser Hand-Wound Tourbillon
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44.2 mmWhite dial
Portugieser
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 40.9 mmWhite dial
Portugieser
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 40.9 mmGrey dial
Portugieser
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 40.9 mmGrey dial
Portugieser
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 40.9 mmBlack dial
Portugieser
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 40.9 mmGrey dial
Portugieser
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 40.9 mmWhite dial
Portugieser
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 40.9 mmWhite dial
Portugieser
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 40.9 mmBlue / Navy dial
Portugieser
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 43 mmGrey dial
Portugieser
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmWhite dial
Portugieser
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmWhite dial
Portugieser
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 43.1 mmWhite dial
Portugieser
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44 mmGrey dial
Portugieser
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44 mmGrey dial
Portugieser
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 42 mmBlack dial
Portugieser
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 46 mmBlack dial
Portugieser
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 46 mmGreen dial
Portugieser
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 43.2 mmBlack dial
Portugieser
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44.2 mmWhite dial
Portugieser
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 46.2 mmBlack dial
Portugieser Perpetual Calendar 42
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 42.4 mmWhite dial
Portugieser Perpetual Calendar 42
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 42.4 mmBlue/Navy dial
Portugieser Perpetual Calendar 44
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44 mmBlue dial
Portugieser Perpetual Calendar 44
Lug width: 22 mm
Source: Maker Attachment: Spring barsCase size: 44 mmBlue dial
Portugieser Perpetual Calendar
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 42.4 mmBlue/Navy dial
Portugieser Perpetual Calendar Tourbillon
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 45 mmBlue / Navy dial
Portugieser Perpetual Calendar Tourbillon
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 45 mmGrey dial
Portugieser Perpetual Calendar Tourbillon
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 45 mmBlue/Navy dial
Portugieser Siderale Scafusia
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 46 mmGrey dial
Portugieser Tourbillon Mystere Retrograde
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44.2 mmWhite dial
Portugieser Tourbillon Mystere Retrograde
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44.2 mmGrey dial
Portugieser Tourbillon Retrograde Chronograph
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44 mmGrey dial
Portugieser Tourbillon Retrograde Chronograph
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44 mmBlue/Navy dial
Portugieser Yacht Club Moon & Tide
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44.6 mmBlue/Navy dial
Portugieser Yacht Club Moon & Tide
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 44.6 mmBlack dial
Portugieser Schaffhausen Portugieser Automatic 40
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 40.4 mmBlue / Navy dialCase material: 18K White Gold
Portugieser Schaffhausen Portugieser Automatic 42 42.5mm Steel
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 42.4 mmBlue dialCase material: Steel
Portugieser Schaffhausen Portugieser Automatic 42 42mm
Lug width: 22 mm
Source: Not yet verified Attachment: Spring barsCase size: 42.4 mmBlue dialCase material: Steel
Portugieser Schaffhausen Portugieser Automatic 42
Lug width: 22 mm
Source: Maker Attachment: Spring barsCase size: 42.4 mmHorizon blue dialCase material: 18 ct white gold
Portugieser Schaffhausen Portugieser Chronograph Ceratanium®
Lug width: 20 mm
Source: Maker Attachment: Spring barsCase size: 41 mmBlack dialCase material: Ceratanium
Portugieser Schaffhausen Portugieser Chronograph
Lug width: 20 mm
Source: Not yet verified Attachment: Spring barsCase size: 41 mmBlue / Navy dialCase material: Stainless steel
Portugieser Schaffhausen Portugieser Perpetual Calendar 44
Lug width: 22 mm
Source: Maker Attachment: Spring barsCase size: 44.4 mmHorizon blue dialCase material: 18 ct white gold
No reference matches.
IWC Portugieser references use 18 mm or 20 mm or 22 mm depending on the reference and case size, so check yours in the list below. The most common is 22 mm (41 of 67 references with a known width). The IWC Portugieser ref. IW371624 and IW371631 take 20 mm (listed by the maker). The IWC Portugieser ref. IW503704, IW501708 and 1 more take 22 mm (listed by the maker).
No. 3 different lug widths appear across the line, often by case size or generation. Check the reference engraved on the case back or between the lugs.
20 mm, with an 18 mm buckle, on the current 41 mm references IWC lists (IW371620, IW371626, IW371631).
No. IWC lists a 22 mm strap width for the 42.4 mm Automatic 42 (IW501701), against 20 mm for the Chronograph; both use an 18 mm buckle.
20 mm with an 18 mm buckle, on a 40.4 mm case (IW358402).
Colourful calfskin, alligator leather, leather alternatives such as TimberTex and rubber straps, plus a stainless-steel bracelet.
Since the 2020 Ref. 3716, steel models come with a newly developed butterfly folding clasp.
The gap between the two lugs that hold the strap, in millimetres. A new strap must match it exactly: 20 mm lugs take a 20 mm strap.
Most watches use spring bars, so any strap of the right width fits. Many smartwatches use their own band system instead, such as Apple Watch bands or Garmin QuickFit.