Porsche Design by IWC Compass Watch

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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