Seiko Cal. 4423 - 931

The Seiko 4423-931 represents an important milestone in Seiko's 1976 lineup. It features a Black dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-525bfe9eeeb4]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

38mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Black

Jewels

23j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1976

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