Helson Spear Diver
The case, in stainless steel, measures 41mm x 12.5mm with 20mm lugs. The crystal is an AR coated sapphire and it is water resistant to 300 meters.
Movement is the Japanese automatic Miyota caliber 9015 with 24 jewels, 28,800 vph and a power reserve of 48 hours.
It is available with a mesh bracelet and a rubber strap. MSRP is $599.