If I remember right it's around sgd 6200 (~usd 4000) for the plain bezel and sgd 21000 (~usd 15500) for the diamond bezel. There's one with a sapphire bezel that's somewhere between the two, about twice the price of plain!
I really like both. I think the diamond bezel one is overpriced - $11,000 extra for a diamond bezel????? The one on the right is more reasonably priced.