Seiko Cal. 5661 - 527

This Spring Drive model from 1979 features a 42mm Gold-Plated case. With its 18mm lug width and 8.1mm profile, it sits comfortably on most wrists. [seikata-wm-248eec77ec97]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1979

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