Seiko Cal. 6631 - 457

The Seiko 6631-457 represents an important milestone in Seiko's 1982 lineup. With its 20mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-8d0bd1f3fe97]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

34j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1982

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