Hollow Watches - M60M by Roger Kellenberger (GALLERY)

Every now and then a totally unique watch catches your fancy and you just have to have it. The M60M designed by Roger Kellenberger does just that. The watch is hollow in the centre and uses a disc which rotates to show the time in hours and quarters.

People who fix appointments at odd times like 7:37 should avoid it though.

The strap of the watch is also unique as it is made of a single strip of steel. The strap uses a method similiar to snowboard bindings. Slide the end of the strap into the buckle and it will lock into place, press the release button and the spring tension of the steel will slide the strap out, allowing you to wear the watch either tight or loose.