The Marine Master series of Seiko's widely proclaimed Prospex line has introduced one of their most iconic designs with their finest technology, creating the Seiko Prospex Marine Master 600m Spring Drive Tuna Can SBDB009.  The SBDB009 uses a titanium with DLC (Diamond Like Carbon) coated shroud with stainless steel components in the inner case, and an exclusive L-shaped packing material creating a seal that is both air and water tight.  The shrouded design of the Spring Drive Tuna Can SBDB009 originally took form in 1975 in Seiko's 6159 600m diver.  Inspired from a letter Seiko received by a professional diver in 1968, Seiko started to research and develope a watch that was not only resistant to water for depths as great as 350m, but also could withstand the shock of being hit against the ocean floor.  The SBDB009 reincarnates this timepiece, using Seiko's proprietary Spring Drive technology to maintain a +/- 15 second per month accuracy rating, as well as a 72 hour power reserve.  The strap included is a new extra strength silicone, that is very comfortable and nearly tear resistant.  It is also in an accordian style to help expand and contract while diving providing additional comfort.  The Seiko Prospex Marine Master 600m Spring Drive Tuna Can SBDB009 is an essential dive tool that can withstand some of the harshest conditions the ocean can offer. 

Caliber: 5R65

Drive system: Spring Drive 

Case Material: Bright titanium with DLC

Glass Material: Sapphire glass

Lumi Brite: Yes (needle, index)

Accuracy: (1 second corresponding day difference ±) 15 seconds per month difference

Waterproof: 600m waterproof for saturation diving

Antimagnetic: Yes

Width: 50mm 

Case Thickness: 16.2mm 

Weight: 126g