IWC Big Pilot's Watch Annual Calendar Spitfire GAS Line JLC manufactures their own movements

JLC manufactures their own movements

This particular Z-Serial example dates to circa 2007 and features an excellent strong case with factory finishing

gold-plated watches don't withstand the rigours of time as well as solid gold or steel

Eterna released a watch called the KonTiki—the name of Heyerdahl’s raft

and the Fifty-Fathoms certainly has that in spades

IWC Big Pilot's Watch Annual Calendar Spitfire GAS Line JLC manufactures their own movementsThe annual calendar is truly a technological marvel. While it plays second fiddle to the perpetual calendar in the minds of most collectors, the reality is that the construction of this calendar mechanism which generally requires adjusting only once per year, at the end of February is equally challenging, and in some cases, requires even more components. This particular annual calendar is special: Part of IWCs Big Pilot collection, its first and