Seiko Cal. 6657 - 810

The Seiko 6657-810 represents an important milestone in Seiko's 1998 lineup. With its 18mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-13e1df48ddb5]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

41mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

23j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1998

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