Seiko Cal. 3831 - 688

The Seiko 3831-688 represents an important milestone in Seiko's 1975 lineup. It features a Cream dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-f13dcebd5007]

Also known as: Tuna, Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

15.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

35j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1975

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