Seiko Cal. 6657 - 625

The Seiko 6657-625 represents an important milestone in Seiko's 1977 lineup. With its 19mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-8df905b86cd1]

Also known as: Bullhead, UFO

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

9.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Silver

Jewels

27j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1977

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