Editorial
The Mark XV (ref. IW325301) is the first modern IWC Mark, produced 1999 through 2006, a return to the 1948 Mark XI design vocabulary after the 1970s 'Da Vinci' and 'Porsche Design' detours. 38mm steel, ETA 2892-A2-based caliber, and a dial layout (6/9/12 triangle markers, date at 3) that became the template every subsequent Mark has refined. The Mark XV controversially dropped the soft-iron inner case its predecessors carried, a weight-saving decision that traded anti-magnetic resistance for a thinner case.
The Mark XVI restored it. It's still the Mark a vintage-leaning collector argues is the best of the line.
The IWC Mark XI (1948) was issued to the British Royal Air Force and is the direct ancestor of every subsequent IWC pilot reference. The Mark XII (1994) reintroduced the line with the JLC-based 889/2 caliber. The Mark XV (1999) brought the ETA 2892-A2 base (IWC-branded as 37524), enlarged the case from 36mm to 38mm, refined the dial to the now-standard triangle-at-12 layout, and (controversially among collectors) dropped the soft-iron inner case to thin the profile.
The Mark XV ran through 2006, replaced by the Mark XVI; the XVII added the larger date window; the Mark XVIII returned to the cleaner small-date format.
Common things to check: dial originality (the matte-black dial is heavily-imitated; look for crisp triangle-12 outline and the 'IWC Schaffhausen' printing, service-replaced dials often have softer print); ETA 2892-A2 base (the caliber is robust and widely-serviceable, but IWC-specific finishing on the bridges is part of the watch's character); strap and bracelet (the standard IWC calf strap with deployant buckle is the factory option; an IWC-branded bracelet is less common and adds a premium); the case is 38mm, meaningfully smaller than the modern 40mm Mark XVIII and 41mm Mark XX, and worn the smallest of the modern Marks. Note that the Mark XV does NOT carry the soft-iron inner case of its predecessors and successors, it's a knowingly less anti-magnetic watch than the Mark XI / XII / XVI / XVIII.
