The fourth edition with the biennial Only Watch charity auction, held Friday in the Hotel Hermitage in Monaco, raised more than €4.5 million ($6 million).

Exclusive timepieces by famous and less famous watch manufacturers are being auctioned off for the benefit of researching Duchenne Muscular Dystrophy.

Complete sale results and a reminder of the models are available after the jump.

This one-of-a-kind Hourglass by Marc Newson will be auctioned off at Only Watch 2011 in Monaco tonight.

Technically, there are no difference between this and the traditional hourglass from Basel 2010 , but the red tinted glass is absolutely beautiful.

Needless to say, the Ikepod Hourglass is one of those items that would be such a thrill to be able to display on one’s desk, coffee table etc.

Only Watch 2011 is just around the corner and here is the video featuring all 40 watches to be auctioned at Only Watch.

For this fourth edition of the world renowned charity watch auction, the world’s most prestigious watchmakers have each created a unique timepiece.

The unique timepieces will be sold by auction house Antiquorum on September 23rd in the Principality of Monaco

Montblanc‘s contribution to Only Watch 2011 is a unique Vintage Pulsographe from the Villeret 1858 in rose gold with white Grand Feu enamel dial.

Here’s a look at Franck Muller’s contribution for the 2011 ONLY Watch charity auction.

The unique watch designed for this occasion is dubbed “Totally Switzerland” and painted in a distinctive vibrant shade of red, characteristic for the Swiss flag.

This model is a variation of the Franck Muller Crazy Hours design, which offers an innovative approach to the concept of time.

2011 saw the launch of the first automatic mechanical movement for Corum’s iconic Golden Bridge watch, featuring an innovative linear winding system.

Corum has take the watch to a new level for the special Only Watch event – the one-of-a-kind piece has a titanium case with a matte finish and provides great views of the movement from both the dial, case-back and sides of the watch.

The back of the watch is specially engraved with the Corum logo and the “Only Watch Piece Unique” inscription in red