Bell & Ross‘s one-off timepiece for the Only Watch auction features a roulette design built on top of their popular BR 01 watch.

This timepiece, done in all 18k pink gold, is a tribute to the country of Monaco which will be hosting the Only Watch auction this upcoming September.

The “0″ number on the roulette wheel indicates the hours (there are 12 little diamonds on the outer edge of the dial for standard timekeeping), the roulette ball indicates the minutes. The roulette spinner which will rotate once every 60 seconds.

The auction will take place in Monte Carlo during the Monaco Yacht Show on September 22th 2011.

The watches will be exhibited in an eight-city tour that includes: Singapore, Hong Kong, Shanghai, Beijing, Tokyo, Los Angeles, Milan and Geneva.

Sources: Perpetuelle – Acquiremag