Seiko Cal. 5639 - 401

Released in 1975, the Cal. 5639 with design code 401 was part of Seiko's domestic market collection. With its 20mm lug width and 14.2mm profile, it sits comfortably on most wrists. [seikata-wm-bf292fd1c221]

Also known as: Pogue, Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

14.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

160m

Dial Color

Cream

Jewels

18j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1975

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