Seiko Cal. 3817 - 309

The Seiko 3817-309 represents an important milestone in Seiko's 1991 lineup. Powered by the 3817 caliber with 26j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-cfe6dfe776b3]

Also known as: Turtle, UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

12.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1991

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