Seiko Cal. 3897 - 931

The Seiko 3897-931 represents an important milestone in Seiko's 1970 lineup. It features a Navy dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-ae06e28b288d]

Also known as: Shogun, Golden Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

44mm

Case Thickness

12.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

40m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1970

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