Jean-Marc Pontroué, the new boss at Roger Dubuis, talks about the brand's four "worlds" - the gambler, the warrior, the adventurer and the diva - and the corresponding collections that it will present at the next Salon International de la Haute Horlogerie.

Blancpain proved watchmaking still has ample room for superlatives when it presented the X Fathoms, its new dive watch and worthy successor to the legendary Fifty Fathoms. The launch took place among the 30,000 fish and 400 sharks in the world's biggest aquarium, the Dubai Aquarium & Underwater Zoo. Taking the plunge was Mark A. Hayek, CEO of Blancpain.

During the week after the annual Salon International de la Haute Horlogerie, the collectors’ blogs are abuzz with news about new favorite pieces and revised Holy Grail lists. Here are some favorite picks from this year’s show to become future hot collectors’ pieces.