The Bremont Supermarine 300m pairs a green gradient dial with applied indexes infilled with white Super-LumiNova®, a green dial ring with a printed minutes track and polished nickel-plated hands, framed by a green uni-directional dive bezel.
The new 40 mm uni-body case is made from 904L stainless steel, 12 mm deep with a 20 mm lug width, under a domed anti-reflective, scratch-resistant sapphire crystal. The screw-in, decorated closed case back helps keep it water resistant to 300 metres (980 feet), and the watch head weighs about 75 g.
Inside is the BE-92AO automatic movement (modified Sellita SW300-1 b) with 25 jewels, a 4 Hz beat and a 56-hour power reserve. Available on a bracelet, a leather strap with side stitch or a green rubber strap.