IW3750-10Ref

The Da Vinci Perpetual Calendar reference IW3750-10 features a brushed stainless steel case paired with a white dial. Introduced in 1985 with the reference 3570, this iconic perpetual calendar mechanism became the industry standard, eventually powering various IWC collections and JLC models. The 39mm by 14.3mm case includes hinged lugs and was originally fitted with plexiglass, though sapphire crystal was available upon request.