Seiko Cal. 5631 - 839

This Hand-Winding model from 1980 features a 46mm Gold-Plated case. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-fa8932b0e410]

Also known as: Crown, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

15.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1980

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