A new Grande Sonnerie watch, the Arena Metasonic will only be available to ten buyers and will set each back $900,000.

Designed by Swiss watch designer Gérald Genta, each watch comprises around 1,100 individual pieces and takes more than a year to put together by hand. It features a luxury ostrich leather strap in combination with vertically-polished and horizontal satin-brushed surfaces.

The case it comes in is also top of the range. Its glass security box renders its contents invisible until the owner pushes the biometrically programmed button, which only responds to their touch.