Guinand World Time Watch WZU-5

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File:Guinand Weltzeituhr WZU-5.jpg
Guinand Weltzeituhr WZU-5

World timer by Guinand

This worldtimer constructed by Helmut Sinn (found of the watch brand Sinn) on base of a Unitas calibre is the first mechanical wristwatch worldwide, which can show the time in 5 different stock exchange cities (Frankfurt, London, New York, Tokio, Hongkong) on 5 different continents of the earth independently. All times in this challenging complication are adjustable independently and manually.




Calibre HS 81 WZ (basis Unitas 6497-1), manual winding, 18,000 A/h
18 jewels
Glucydur balance wheel
Hairspring: Nivarox 1
Shock protection: Incabloc, precision adjustment: Triovis
Decoration: Geneva stripes, solar grinding, perlage
Screws: polished, blued
Module construction: 4 time zones in 24 hours mode, each adjustable independently
Specialities: indirect central seconds, hacking seconds
Power reserve ca. 40 h


Stainless steel
Ø 44.80 mm, height: 14.50 mm
Sapphire crystal, sapphire crystal caseback
Waterproof to 50 m (DIN 8310)


Crocodile leather strap, lined. Tang-type buckle in stainless steel
Optional: Metal bracelet in stainless steel, 7 rows, stainless steel clasp


The four sub-dials are unprinted as standard. Individually city names can be attached for surcharge.
For an extra charge the movement is available with swan-neck precision regulator or with swan's neck fine regulation, screwed balance and engraved balance cock