Seiko Cal. 6647 - 374

This Hand-Winding model from 1987 features a 45mm Hardlex-Coated Steel case. With its 18mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-dd00cd768be2]

Also known as: Monster, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1987

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