Seiko Cal. 3817 - 991

The Seiko 3817-991 represents an important milestone in Seiko's 1988 lineup. It features a Cream dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-7d5497ba2f37]

Also known as: Tuna, Navigator

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Cream

Jewels

32j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1988

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