Seiko Cal. 5639 - 636

Released in 1969, the Cal. 5639 with design code 636 was part of Seiko's domestic market collection. It features a White dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-f1d0776c6ae5]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

White

Jewels

20j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1969

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