IWC Ingenieur SL Perpetual Calendar / Strap / English Ref. IW3540-03

The IWC Ingenieur SL Perpetual Calendar / Strap / English IW3540-03 has a 34.5 mm yellow gold case, and is water resistant to 30 metres.

The ref. IW 3540-003 has a yellow gold case and a leather strap. Earlier versions were powered by caliber 35780; later ones (post 1989) feature caliber 35782.

Diameter: 34.5 mm
Water resistance: 30 m
Case: Yellow Gold
Released: 1987
Movement: IWC caliber 35782

Specifications

Case and dimensions

Case diameter: 34.5 mm
Case shape: Cushion
Case material: Yellow Gold
Crystal: Sapphire
Case back: Closed
Water resistance: 30 m

Dial

Dial colour: White
Indexes: Stick / Dot
Hands: Stick

Movement

Calibre: IWC caliber 35782
Movement maker: IWC
Movement type: Automatic
Display: Analog
Power reserve: 42 h
Frequency: 28800 vph
Jewels: 37
Movement diameter: 25.6 mm
Complications: Date, Day, Hours, Leap Year, Minutes, Month, Moonphase, Perpetual Calendar, Seconds and Year Indicator