You can get reissued George Nelson clocks, but if you want the real deal, you can bid for this original George Nelson Sunburst Clock by Howard Miller.
Indeed, the reissued Nelson Sunburst clocks go for in excess of £200, so that's not exactly a cheap option. This one is signed (see close-up on the listing) and is down as working, with some wear and tear by way of the scuffs, scratches and wear to the brass. Again, see the listing for the full breakdown.
It's certainly an eye-catching piece though, amazing that something like this was in production around 50 years ago. £78.15 is the current price.