Heimdallr H1 Bronze Tuna

The H1 is Heimdallr's take on the tuna-can diver, the style named for its broad shrouded case, here in aluminium bronze, which develops a patina over time. It is large, 47 mm across without the crown and 14.5 mm thick, but only 44.8 mm lug to lug, so it sits on the wrist better than the diameter suggests. It is rated to 300 m with a screw-down crown, under a unidirectional ceramic bezel and a sapphire crystal, with C3 Super-LumiNova on a black dial. Inside is the Seiko-made NH35A automatic, with hacking, hand-winding, a date and about 41 hours of reserve. It comes on a solid stainless steel bracelet, so it is not nickel-free, and on it the watch weighs 160 g.

Written 28 September 2026 from Heimdallr.