Seiko Cal. 6661 - 556

This Spring Drive model from 1977 features a 46mm Hardlex-Coated Steel case. With its 22mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-c1f75f8dcfee]

Also known as: Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

9.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1977

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