Seiko Cal. 6657 - 890

The 6657-890 is a sought-after Hand-Winding piece from Seiko's golden era. With its 21mm lug width and 10.2mm profile, it sits comfortably on most wrists. [seikata-wm-e9e0fcd2bf26]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1981

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