Pilot's Watch Chronograph 43mm
| Reference | IW377701 |
| Serial Number | 53XXXXX |
| Case | Stainless Steel • 43.0 mm (15.2 mm height) |
| Crown & Water Res. | Screw-In Crown • 6 bar (approx. 60 m) |
| Movement | IWC Calibre 79320 Automatic (28,800 vph • 44h reserve • 25 jewels • 240 components) |
| Complications | Chronograph (Hours, Min, Sec), Day & Date, Small Hacking Seconds |
| Dial | Black Dial • Luminous Hands & Quarter Indices |
| Crystal | Convex Sapphire, Dual AR Coating, Secured Against Depressurization |
| Magnetic Protection | Soft-Iron Inner Case (Faraday Cage) |
| Lug Width / Strap | 21.0 mm • OEM Santoni Black Calfskin (Orange Lining) |
| Buckle | OEM IWC Stainless Steel Pin Buckle |
| Delivery | Watch + Warranty Card (no box) |
| Card Date / Origin | October 2015 • Duty Free Dubai |
| Timing Diagnostics | -3 s/d • 288° Amplitude • 0.1 ms Beat Error |
| Condition | Excellent Pre-Owned Condition |
Cockpit Architecture & Heritage
Engineered in the tradition of IWC Schaffhausen flight instruments, Reference IW377701 features a high-legibility black dial with white Arabic numerals. Luminescent coating is applied to the matte black hands and the cardinal hour markers at 12 (historic flight triangle and dots), 3, 6, and 9 o'clock. The dial features an altimeter-style vertical triple-date display with a signal red indicator at 3 o'clock and a signal red running seconds hand at 9 o'clock. The 43mm stainless steel case houses a soft-iron inner case shielding the Calibre 79320 automatic chronograph movement against magnetic fields up to 40,000 A/m. The convex sapphire crystal features antireflective coating on both sides and is secured against displacement caused by sudden drops in cockpit air pressure.
The Santoni Leather Partnership
This timepiece is equipped with an authentic OEM strap crafted in collaboration with legendary Italian luxury shoemaker Maison Santoni (Corridonia, Marche). Partnered with IWC since 2009, Santoni artisans finish each strap using their proprietary anticatura hand-patination technique—applying multiple layers of dye and natural waxes to give the black calfskin nuanced dimensional depth. The strap features Santoni's hallmark signature: a vibrant orange leather lining on the reverse, paying homage to the iconic orange soles of their bespoke footwear. Fitted with the classic authentic OEM IWC stainless steel pin buckle, featuring the clean engraved IWC emblem on the crossbar.