Seiko Cal. 6657 - 243

The Seiko 6657-243 represents an important milestone in Seiko's 1981 lineup. With its 21mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-50384f3ca288]

Also known as: Bullhead, Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Silver

Jewels

36j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1981

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