1999 „Simpli-Tourbillon” #13
Based on calibre IWC 983. Carriage made from titanium. Monometal balance with "free-sprung" hairspring. Regulation via excenters on the balance. Extrem "slim-diameter" carriage. First tourbillon on IWC-base visible from the front. Solid stainless steel case in form of a "Portugieser" with crystal caseback.