This replica Pilots IW388110 43mm is a chronograph that sits between the compact 41mm generation and the oversized 44.5mm Top Gun models, occupying a middle ground that the previous Pilots chronograph generation once held as standard. The 43mm diameter was the default for IWC pilot chronographs before the 2021 downsizing, and the IW388110 retains that proportion for wearers who find 41mm too small and 44.5mm too dominant. The result is a chronograph that feels substantial on wrist without requiring large wrist circumference to carry.

Technical Overview

• Case diameter: 43mm
• Case material: stainless steel
• Dial: dark with contrasting subdials
• Crystal: sapphire with anti-reflective treatment
• Chronograph: automatic column-wheel
• Functions: hours, minutes, small seconds, chronograph, date
• Water resistance: 100 meters

At 43mm the IW388110 maintains backward compatibility with strap widths and lug geometry from older pilot chronographs, making it easier to source aftermarket straps if needed.

Inside the Movement

The automatic chronograph inside the IW388110 uses the same column-wheel architecture found across the current Pilots chronograph range. The 43mm case provides marginally more internal volume than the 41mm variant, though both house mechanically identical movements. The bi-directional pawl winding system captures energy efficiently from wrist motion, and the soft-iron inner cage provides anti-magnetic shielding rated for everyday electronic exposure. Subdials follow the 6-9-12 layout for running seconds, 60-minute counter, and 12-hour totalizer. Compare this middle-ground sizing against the AMG Petronas IW388108 at 41mm, or browse the Pilots catalog for every diameter option.

What Sets It Apart

The 43mm case diameter defines the IW388110 within the current Pilots lineup. While IWC shifted its primary chronograph platform to 41mm, the 43mm format persists for wearers who built their preference around the previous generation’s proportions. The extra 2mm over the 41mm variants translates to roughly 8% more dial area, which makes the chronograph subdials and date window fractionally more legible without adding conspicuous bulk. For anyone comparing iwc schaffhausen chronograph sizes, this replica Pilots IW388110 43mm fills the gap between contemporary compact and legacy oversized.