"IWC" Pilot Series, Model: IW389105 Rare TOPGUN naval air combat unit of the same model as Gu Ailing, rare new Flying Chronometer white ceramic "Lake Tahoe" special edition. The entire watch is made of white ceramic, with a 44.5mm black dial, clear and easy-to-read digital hour markers, luminous indication, three-sub-dial chronograph function, practical dual calendar display, titanium crown, and is equipped with the new self-produced 69380 automatic winding movement The titanium case back is engraved with the TOPGUN logo, and it features a white rubber strap and a titanium folding clasp