Seiko Cal. 3897 - 840

The Seiko 3897-840 represents an important milestone in Seiko's 1983 lineup. It features a Green dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-4ff6d3416342]

Also known as: Sea Horse, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1983

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