Seiko Cal. 0718 - 639

The Seiko 0718-639 represents an important milestone in Seiko's 1968 lineup. Powered by the 0718 caliber with 21j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-d3c399b9d35f]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1968

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