Seiko Cal. 4522 - 381

The Seiko 4522-381 represents an important milestone in Seiko's 1968 lineup. It features a Black dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-dc3ddc55abea]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

15.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Black

Jewels

20j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1968

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