Seiko Cal. 6637 - 561

This Automatic model from 1974 features a 36mm Gold-Plated case. With its 20mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-6ddc72d6c94b]

Also known as: Sea Horse

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

8.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1974

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