The IWC Portugieser Perpetual Calendar Tourbillon reference IW504-507 launched in 2026 as an 18-piece limited edition for Bucherer. Based on the 150th-anniversary collection design, it houses the self-winding caliber 51950 within a 45mm Armor Red Gold case.
Shape
Round
Lug Distance
22.00 mm
Material
Red Gold
Glass
Sapphire
Thickness
15.30 mm
Diameter
45.00 mm
Water Resistance
30.00 m
Dial Color
Silver
