Seiko Cal. 3840 - 644

The Seiko 3840-644 represents an important milestone in Seiko's 1975 lineup. It features a Navy dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-ee1c762bca22]

Also known as: Samurai

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

34mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1975

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