Seiko Cal. 6657 - 455

The Seiko 6657-455 represents an important milestone in Seiko's 1975 lineup. With its 22mm lug width and 8.3mm profile, it sits comfortably on most wrists. [seikata-wm-351bb8e65e9a]

Also known as: Helmet, Sea Horse

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

8.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1975

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