The case marks them out as members of the house’s Luminor family, featuring its signature crown-protecting device. At their heart beats the P. 900 calibre, which powers a seconds sub-dial at 9 o’clock and a 72-hour power reserve.

The Submersible QuarantaQuattro Bianco combines a steel case and a brilliant white dial with a green strap; while another version, PAM01229, comes with a steel case, a black dial and straps in black rubber and dark grey fabric.

STYLE Edit: Panerai’s stunning his and hers Luminor Marina and Due watches

A third option, the Submersible QuarantaQuattro Carbotech Blu Abisso, features a dial and straps in undersea blue, alongside a case made from carbotech, a material developed by Panerai that combines remarkable strength with a feeling of something close to weightlessness on the wrist.

Panerai is determined to be a good steward of the natural world, and is constantly on the lookout for ways it can be more sustainable.

Another of the new QuarantaQuattro models constitutes eloquent testimony to that commitment, with the Panerai Submersible QuarantaQuattro eSteel made from more than 50 per cent recycled materials. It comes with dials and straps in a choice of deep blue, grey and green.

STYLE Edit: Inside Panerai’s new, smaller Luminor Marina Quaranta

Finally, the Submersible QuarantaQuattro Luna Rossa showcases Panerai’s partnership with an organisation that’s at the forefront of daring marine endeavour: the Luna Rossa team from Italy, winner of the Prada Cup challenger series in the last America’s Cup.

The new watch, celebrating Panerai’s ongoing sponsorship of the team, comes in a marine palette of blue, white and red, and is available in a limited edition of 1,500.