The IWC Portugieser Tourbillon Hand-Wound ‘F.A. Jones’ features a 43.10 case which holds the hand-wound caliber 98900 movement. At 9:00 there’s a view of the tourbillon escapement; at 3:00 there’s the signature of IWC’s founder, F.A. Jones.Reference IW5447-05 has a Red Gold case and a Black dial.
