It has been serviced by IWC in 2014 and a check over in 2016 again by IWC. IWC PILOT CHRONOGRAPH 3717-01 (with 3717-04 bracelet). - Model: IWC Pilot's Chronograph. I later added the steel bracelet (i.e. the 3717-04 variant) and later again I added the calf skin black/red strap with buckle.
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