Seiko Spring Drive Tuna Titanium watch. Real JDM SBDB009, not the later SBDB013 made for the US market. As seen by the signed and molded "S" on the crown and NOT laser-etched Prospex "X".
If the crown doesn't have a Seiko 'S', then it's not a SDBD009.
Small imperfections and wear marks as shown in the photos. Overall excelent condition and good condition original rubber strap. will also include aftermarket steel black bracelet.
Big titanium watch that wears surprisingly light.
the best part of this particular Seiko Marinemaster SBDB009 Spring Drive Tuna comes from within — the 5R65 spring drive is mechanically identical to the 9R65 in the GRAND SEIKO, made in Morioka studio (which is where this watch is built)!
This Seiko Marinemaster wristwatch is a high-quality timepiece. It features a black dial with luminous indexes and hands, a self-winding movement, and a scratch-resistant and shock-resistant case made of stainless steel and titanium. The rotating bezel and screwdown crown add to the watch's functionality and durability.
With a water resistance of 600m, this watch is suitable for any water-based activity. The black bracelet is made of a combination of stainless steel, silicone, and metal, making it comfortable to wear.