Seiko Cal. 5639 - 827

This Hand-Winding model from 1969 features a 41mm Hardlex-Coated Steel case. With its 21mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-326aa89c31a4]

Also known as: Tuna, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

8.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

35j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1969

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