Introducing a mechanical diver's model that has evolved by installing the 3Days Cal.6R55 in a 300m air diving waterproof case. Equipped with the mechanical 3Days movement Cal.6R55, which boasts high reliability and a long power reserve of 3 days (about 72 hours). While being waterproof for 300m air diving, it has a compact size that fits comfortably on the wrist. The combination of a bracelet with a short link pitch and a compact buckle provides a comfortable fit. The highly legible symmetrical dial layout and the date at 4-5 o'clock are used to improve visibility in dark places. / Caliber: 6R55 / Operation period: Approximately 72 hours when fully wound / Accuracy: +25 seconds to -15 seconds per day / Number of jewels: 24 / Second hand stop function / Water resistant to 300m for air diving / Calendar (date) function / Lumibrite: Yes (hands, indexes, bezel) / Antimagnetic: Yes / Screw back / Reverse rotation prevention bezel / Screw-lock crown / Double lock clasp / Band adjustment: C-ring type / MADE IN JAPAN

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Seiko  Mechanical  Automatic  Silver  Seiko USA  Seiko Prospex Black Dial 40MM 1965 Revival Divers Automatic SPB453J1  Seiko Prospex Diver's Polyester Black Dial Automatic SPB239J1 200M  Seiko Prospex SBDC197 300m 3 Days Mechanical Diver's