Competition: Dezeen Watch Store have teamed up with Hong Kong brand Ziiiro to offer readers the chance to win one of five Proton watches that tell the time with colour.

Like Ziiiro’s earlier models Aurora and Celeste, the Proton watch face consists of two graduated disks, one yellow and one blue, in place of hands.

These disks move over each other as time passes, creating a graduated mix of colour on the face at different times of the day.

Proton has a rigid transparent strap, and the face can be removed and swapped with any others from the Ziiiro range.

This competition has now closed.

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Five winners will be selected at random and notified by email. Winners’ names will be published in a future edition of our Dezeenmail newsletter and at the bottom of this page. Dezeen competitions are international and entries are accepted from readers in any country.

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You can see our full range of Ziiiro watches at www.dezeenwatchstore.com or order over the phone on +44 20 7503 7319.

Here's some more information from Ziiiro:

The Proton is a beautiful and elegant watch displaying time using two transparent gradient discs, blue color representing the hour and yellow displaying the minute. By overlapping both gradients, it creates a new array of green color that will catch attention whether at the beach or going out on a date. The Proton is fully interchangeable with all watches from the bracelet series. Available in three colours of transparent, transparent-smoke and milky-white.

Product specifications:

Overall description

Case: matte without PVD
Case back: polished stainless steel
Dial: plain white with grey dotted markers
Strap: plastic
Crown: 3 hour position
Hands: transparent coloured discs/hour and minute

Components

Case width: 38mm
Case thickness: 7.5mm
Plastic strap: 43mm
316l stainless steel
Miyota 1l-26 quartz movement
Hardened mineral crystal
Snap-up case back
Battery: sr616sw

Water resistant - 3ATM
One year warranty
Fitting: suitable for wrist size 13.5cm - 16cm

Follow Ziiiro on Facebook here.

Congratulations to the winners! Lucie Najvarová in the Czech Republic, Ricky Suen in Hong Kong, Sara Borchiero in Italy, Julian Pongratz in Austria and Allison Scarborough in Australia all won a Proton watch.