IWC Pilot Double Chronograph 3713

purchased in 2000 Double antimagnetic split-seconds chronograph Pilot ref. : 3713. Round steel case with screwed back (signed and numbered). Black railroad dial, luminescent indexes and Arabic numerals, superluminova skeleton hands. Three hollow counters: minutes at 12 o'clock, hours at 6 o'clock, small seconds at 9 o'clock, date and days of the week windows at 3 o'clock. Steel bracelet with IWC folding clasp. Mechanical movement with automatic winding caliber 79230. Diam. : 42mm. Condition: Very beautiful box, purchase invoice