Tutima M2 Seven Seas S 44mm Blue Dégradé (6155-04)

The S line puts the Seven Seas case into stainless steel, brushed and partly polished, and Tutima gives the letter three readings: steely, sporty, spectacular. The case is 44mm across and 13mm deep with a threaded crown and a threaded back, and lateral flanks stand either side of the crown to take a knock. The sapphire crystal is three millimetres thick and nine on the Mohs scale, which leaves only diamond above it. So protected, the self-winding Caliber Tutima 330 runs thirty-eight hours from full wind and carries the date. The case is pressure tested to fifty atmospheres, the equivalent of five hundred metres of water.

The dial is a blue dégradé that deepens toward its edge, matched to a blue ceramic bezel insert turning in one direction only over a sixty minute scale. Super-LumiNova on the hands and indices. On a stainless steel bracelet with folding clasp.