Competition: we're giving away a NAVA watch by designer Denis Guidone, courtesy of Dezeen Watch Store, for the best image of Milan's design week posted to Instagram using our #milanogram2015 hashtag.

The #milanogram2015 hashtag will include behind-the-scenes images of Milan's annual design fair captured by Dezeen's team of journalists, as well as designers including Tom Dixon, Benjamin Hubert and Richard Hutten, and visitors attending the event.

The best images submitted by event visitors using #milanogram2015 will be regrammed by Dezeen's Instagram account and included in a series of daily updates on Dezeen.

An overall winner will be selected by Dezeen's editor-in-chief Marcus Fairs, editor Anna Winston and design editor Dan Howarth, and will be awarded with a blue version of Ora Unica, a watch by Milanese designer Denis Guidone that is manufactured by Italian brand NAVA.

The unisex watch features a squiggly line instead of hands, with one end marking the hours and the other the minutes. It has a 36mm-diameter case and comes in a gift box with a blue copy of My Fluo Book – a book by Denis Guidone designed to encourage the owner to write stories.

Ora Unica is also available to buy on Dezeen Watch Store in black or white.

The winner will be notified via Instagram. Dezeen competitions are international and entries are accepted from readers in any country. Competition closes 20 April 2015.