Luxury mobile phone manufacturer Gresso, unveiled its new exclusive project, the iPhone4 Time, “designed specifically for people living in the rhythm of world time”.

The iPhone4 Time Machine houses six independent mechanical Swiss watches behind the smartphone’s case protected by a mineral glass with diamond coating.

The 6 clocks display time zones of the world’s business hubs: Tokyo, Moscow, Paris, London, New York and Hong Kong.

Amazingly, Gresso claim that the iPhone 4 Time Machine is only 1mm thicker than a vanilla iPhone 4 (which measures 9.3mm).

The Gresso iPhone 4 Time Machine is coming out “in 2011” and it will set you back $6,000.