Seiko Cal. 6631 - 921

This Automatic model from 1986 features a 39mm Two-Tone case. It features a Navy dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-7d4f14af3a2c]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

29j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1986

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