Happy Fish by Chopard was first launched in 2002, itself one of the many variations on the Happy Diamonds theme created in 1993 by Caroline Scheufele and featuring diamonds free to move between two sapphire crystals. In this 25-piece limited edition, the fish is sculpted in mother-of-pearl, with hand-applied gold leaf decoration and jasper eye. It is swimming against a backdrop of snow-set blue sapphires, with the seven free-moving diamonds above. The unusual feature of this watch is that the fish is treated with SuperLuminova, a luminescent substance that makes it glow bluish in low light conditions: the mobile diamonds are also treated in the same way.

The case in pink gold is 36 mm in diameter and 12.08 mm thick, with the standard 30 metres water resistance. The bezel is diamond-set. The watch is mounted on a white alligator strap. The watch has a mechanical self-winding movement, 42 hours power reserve.

This is a boutique edition, reference 274891-5015, limited to 25 pieces.