Seiko Cal. 3840 - 647

The Seiko 3840-647 represents an important milestone in Seiko's 1974 lineup. With its 18mm lug width and 15.7mm profile, it sits comfortably on most wrists. [seikata-wm-caadbc6b3fbe]

Also known as: Goldfeather, Sea Horse

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

43mm

Case Thickness

15.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Champagne

Jewels

34j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1974

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