Seiko Cal. 3831 - 918

The 3831-918 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-b3649d9a2bbe]

Also known as: Turtle, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

160m

Dial Color

Black

Jewels

27j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1974

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