Seiko Cal. 4428 - 820

The Seiko 4428-820 represents an important milestone in Seiko's 1988 lineup. It features a Black dial protected by a Sapphire crystal and offers 200m of water resistance. [seikata-wm-381b1c14f7ac]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1988

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