Seiko Cal. 6631 - 780

This Spring Drive model from 1989 features a 35mm PVD Black case. It features a White dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-c730bd9e9c7f]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1989

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