Deep Gray 300

The Sheffield Deep Gray 300 is the first Sheffield diver engineered and tested for 300 meters of water resistance. To achieve this, we developed an all-new 42mm case crafted from 316L stainless steel, designed not only to withstand the pressure of deep water, but to securely house every component within. At its core is the reliable NH35 automatic movement, protected by an anti-reflective sapphire crystal and paired with highly visible C3 Swiss lume on the dial, hands, and bezel insert for exceptional readability in any conditions. Heavy-duty spring bars connect a matching nylon web strap to robust 22mm lugs featuring Sheffield's signature external detailing. The full-wrap hook-and-loop closure provides a secure, comfortable fit whether worn directly on the wrist or over a wetsuit. Built for adventure above and below the surface, the Deep Gray 300 combines Sheffield's vintage-inspired design language with modern durability and performance.