Seiko Cal. 7031 - 478

The Seiko 7031-478 represents an important milestone in Seiko's 1977 lineup. With its 21mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-b558b76a3f19]

Also known as: UFO, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

46mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

120m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1977

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