Seiko Cal. 6331 - 556

This Spring Drive model from 1989 features a 44mm Hardlex-Coated Steel case. It features a Burgundy dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-6f91494c0b6d]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1989

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