The Hull California Automatic takes its name from the "California" dial — a design that pairs Roman and Arabic numerals on the same face, a look that first showed up on luxury pieces back in the 1930s. Hull itself leans into a cushion-shaped case, a nod to the collection's nautical roots, and comes in two colorways here: Volcanic Black and Granite Black, both built around a deeply textured black dial.

The case measures 42mm across and 47.5mm lug-to-lug, in 316L stainless steel finished at 15mm thick. A mineral lens with anti-reflective coating sits over the textured dial, with applied indexes lumed in Swiss Super-LumiNova, and the crown is a screw-lock type. Each comes on a 22mm genuine leather strap — dark brown on Volcanic Black, brown on Granite Black — and the finished watch weighs 95 grams.

Power comes from a TMI (Seiko Subsidiary) NH35 automatic movement, winding itself off wrist motion rather than a battery or manual winding. It runs at 21,600 beats per hour across 24 jewels, holds a power reserve of 41-plus hours, and includes a date window at three o'clock.