Seiko Cal. 3831 - 997

The Seiko 3831-997 represents an important milestone in Seiko's 1965 lineup. It features a Navy dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-4dbd45959d4f]

Also known as: Monster

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1965

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