IWC Portuguese Perpetual Calendar Tourbillon Armor Gold / Bucherer Ref. IW504-507

The IWC Portuguese Perpetual Calendar Tourbillon Armor Gold / Bucherer IW504-507 has a 45 mm red gold case, measures 15.3 mm thick, and is water resistant to 30 metres.

The IWC Portugieser Perpetual Calendar Tourbillon reference IW504-507 was introduced in 2026 as a limited edition of 18 pieces for Bucherer. Building on the template provided by the Portugieser Perpetual Calendar Tourbillon of the 150th anniversary collection, it features an 'Armor' Red Gold case of 45mm, which holds the self-winding caliber 51950 movement.

Diameter: 45 mm
Thickness: 15.3 mm
Water resistance: 30 m
Case: Red Gold
Released: 2026
Movement: IWC caliber 51950

Specifications

Case and dimensions

Case diameter: 45 mm
Thickness: 15.3 mm
Lug width: 22 mm
Case shape: Round
Case material: Red Gold
Crystal: Sapphire
Case back: Open
Water resistance: 30 m

Dial

Dial colour: Silver
Finish: Matte
Indexes: Arabic Numerals
Hands: Feuille

Movement

Calibre: IWC caliber 51950
Movement maker: IWC
Movement type: Automatic
Display: Analog
Power reserve: 168 h
Frequency: 19800 vph
Jewels: 44
Movement diameter: 38.2 mm
Complications: Date, Day, Hours, Minutes, Month, Moonphase, Perpetual Calendar, Small Seconds, Tourbillon Escapement and Year Indicator