Porsche Design by IWC Compass Watch

The Compass Watch is an expedition watch by Porsche Design and IWC.

This watch, first presented in 1978, become legendary by two properties first, as a typical manifestation of the collaboration between the designer Professor Ferdinand Alexander Porsche and IWC, and secondly by the compass function as an additional feature The upper housing part can be opened with a key lock and thereby enables the use of the compass.

Reference:

3511 (titanium) (3510 aluminum case, 3551 with moon phase indication)

Movement

Self-winding movement IWC 375.23
ball-bearing rotor
40 hours power reserve

Case:

Titanium / Aluminum
D 40 mm, H 12 mm / D 39 mm, H 12.9 mm
Sapphire crystal with anti-glare treatment
Screw-in caseback with mirror
Speciality the upper case part can be locked open with a key and thereby allows the use of the compass
Waterproof to 30 m

Dial:

Black with decent white hair cross
Indexes with luminous material
Hands with luminous material

Functions:

Hours, minutes, central seconds, date, compass + mirror

Bracelet:

Bracelet in titanium
Security bushbotton clasp

Variants:

Since 1978 the watch has been launched in several variants with, inter alia, an aluminum housing and with carbon fiber strap