The ref. IW3762-06 is similar to the IW3762-05, though it is fitted with a different strap and a folding clasp. It has the same red gold case and black dial. This watch is powered by caliber 79261.
The ref. IW3762-05 Da Vinci Perpetual Edition has its rose gold case paired with a black dial. It is powered by caliber 79261, the well-known chronograph perpetual calendar on Valjoux 7750 base.
The ref. IW3762-03 Da Vinci Perpetual Edition Kurt Klaus has a rose gold, tonneau-shaped case. It is powered by caliber 79261.
The ref. IW3762-01 has a tonneau-shaped case in platinum. It is powered by caliber 79261, which is the Valjoux-based perpetual calendar chronograph by IWC.