Seiko Cal. 6331 - 820

This Spring Drive model from 1984 features a 37mm Two-Tone case. It features a Cream dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-faf603035e64]

Also known as: Golden Tuna, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Cream

Jewels

31j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1984

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