Seiko Cal. 5661 - 997

This Spring Drive model from 1969 features a 36mm Stainless Steel case. The Inner Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-015258739413]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

13.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1969

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