Seiko Cal. 6639 - 780

The Seiko 6639-780 represents an important milestone in Seiko's 1967 lineup. With its 19mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-dc92ae8f704c]

Also known as: Sea Horse

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1967

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