Seiko Cal. 5639 - 978

The Seiko 5639-978 represents an important milestone in Seiko's 1967 lineup. It features a White dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-c6c604164060]

Also known as: Silverwave, Sportsmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

43mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

White

Jewels

18j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1967

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