this is the older version ref. 5002 with a great darkbrown buffel strap on
pics found on the net made by a private owner (found no name) but they where so beautiful that i hope he don't mind i use them here
Ref. IW500401 Big Pilot
- Calibre: 5011- Mechanical movement
- Automatic Pellaton winding system (IWC patent)
- Vibrations: 18 000/h- Jewels: 44
- Power-reserve: 7 days (168 hours)
- Date display
- Power reserve display
- Central seconds with stop function
- Beryllium alloy balance with high-precision adjustment cam on the balance bars
- Brequet spring- Inner case made of antimagnetic soft iron- Screw-in crown- Convex sapphire glass secured against displacement by drop in air pressure
- Inner case: soft iron for protection against magnetic fields- Glass: sapphire, convex, resistant against pressure drop
- Crown: screwed
- Water-resistant: 6 bar (60 m)
- Case diameter: 46.2 mm
- Case height: 15.8 mm
- Weight: stainless steel with crocodile leather strap = 149 gData:Inner case: soft iron for protection against magnetic fields
- Glass: sapphire, convex, resistant against pressure drop
- Crown: screwed - Water-resistant: 6 bar (60 m)
- Case diameter: 46.2 mm
- Case height: 15.8 mm
- Weight:Big Pilot’s Watch in 18 ct. white gold with crocodile leather strap: 185 g Big Pilot’s Watch in stainless steel with crocodile leather strap: 147 g
Valuable information:Since 2002, the Big Pilot’s Watch has been IWC’s flagship. Its IWC-manufactured 51110 movement contains all the features that have proved their worth in the long history of IWC mechanical watches. Within no time at all, the automatic movement – currently the largest of its kind in the world – generates a power reserve of 8.5 days, but only runs for seven before an ingenious little mechanism automatically stops it. This is because the torque that drives the movement decreases as the mainspring winds down, leading to a loss of amplitude in the balance and possible inaccuracy. The screw balance, with its Breguet spring and fine-adjustment cams, is taken from the Mark 11 and has passed all its endurance tests as a “navigator’s wrist watch” with flying colours. The giant among the pilot’s watches embarked upon 2006 with a number of slight modifications, and is now available either in white gold with a slate grey “ardoise” dial or in stainless steel with a black dial, as well as a crocodile leather strap in black or dark brown. The shapes of the hands and the dial designs have been modified to match those of the other models in the series. All models in the Pilot’s Watch Classics collection now have the same uniform appearance.Info:IWCNote: Cal. 51110 is an improvement version of 5011. This newer movement rans at 21,600 vph
