Seiko Cal. 5640 - 630

Released in 1987, the Cal. 5640 with design code 630 was part of Seiko's domestic market collection. It features a Green dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-4ba5f4ca6705]

Also known as: Rally, Golden Tuna

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1987

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