The mooted device is likened to a "slap wrap" - a thin strip of metal covered in fabric which snapped around the user's wrist to form a bracelet.

BBC: Apple smart watch efforts confirmed by US patent

The secret to the screens is in what's behind them: a thin strip of metal-coated plastic that's only 50 microns thick -- about half the width of a human hair -- and wraps around a spool.

CNN: HP developing a 'Dick Tracy' wristwatch

Then a band made of a thin metal strip is affixed to it.

ECONOMIST: Chinese cloisonn��