Watch Straps for the IWC Pilot's Watch
IWC's Pilot's Watch collection covers a range of aviation-inspired timepieces — from the refined Mark XVIII and XX to the imposing 46mm Big Pilot. The Pilot chronograph and Spitfire lines complete the lineup. Most IWC Pilot watches use 20mm lug widths, with the Big Pilot and larger chronographs using 21mm or 22mm. Their aviation heritage calls for leather, canvas, and NATO straps that reference cockpit and military aesthetics. IWC official replacement straps cost $150–$300. Other sites have leather, canvas, and NATO alternatives from $5.
Buying tips
- 01Mark XVIII and Mark XX use 20mm — the most common lug width with the widest selection on other sites.
- 02Big Pilot 43mm uses 21mm; Big Pilot 46mm uses 22mm — both are available on other sites in leather and NATO.
- 03The IWC Pilot's Watch's aviation aesthetic calls for simple, functional straps — calfskin leather with a plain tang buckle or a canvas NATO.
- 04Brown leather is the most period-correct choice for the Mark series; black leather for the Spitfire.
Popular strap styles for the IWC Pilot's Watch
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What lug width is the IWC Pilot's Watch Mark XX?
The IWC Pilot's Watch Mark XX uses a 20mm lug width. This applies to all current Mark XX references (IW328201, IW328202, IW328211) and the previous Mark XVIII generation. The Big Pilot 43mm uses 21mm; the Big Pilot 46mm uses 22mm. The Pilot Chronograph (43mm case) uses 21mm. The Spitfire collection typically uses 20mm or 21mm depending on the specific reference. For the Mark XVIII and Mark XX — the most commonly owned IWC Pilot references — 20mm is the correct width. The Mark XX's 40mm case is correctly proportioned for a 20mm strap tapered to 18mm at the buckle.
What's the best cheap strap for the IWC Pilot's Watch?
The IWC Pilot's Watch Mark XVIII/XX is an aviation instrument watch with a clean, functional aesthetic — and the strap should match. Calfskin leather in dark brown or black is the most authentic choice: search 'calfskin leather strap 20mm quick release' on other sites for $8–$18 options. For a more casual or outdoor-ready look, canvas straps in olive, tan, or black at $6–$14 are excellent — they match the watch's utility-aircraft heritage. A G10 ballistic nylon NATO in 20mm at $3–$8 is the most practical choice for travel or active use. The Big Pilot variants (43mm or 46mm) look best on leather in medium-brown tones that echo their aviator origins.
Can I put a NATO strap on an IWC Pilot's Watch?
Yes — the IWC Pilot's Watch on a NATO is a natural combination. NATO straps have the same military-utility origins as pilot watches — both were designed for practical, rugged use. Olive, black, and tan G10 nylon NATOs are the most authentic pairings for the Mark series and Big Pilot. The Mark XX's straight, relatively flat lugs accept NATO straps easily without crown interference. The Big Pilot's larger case (43–46mm) suits the extra bulk of a NATO without looking disproportionate — in fact, the extra presence of the NATO hardware complements the Big Pilot's own imposing dimensions. Other sites G10 NATO straps in 20mm and 22mm run $3–$8.