Seiko Cal. 5638 - 166

Released in 1981, the Cal. 5638 with design code 166 was part of Seiko's domestic market collection. It features a White dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-ec4899f94ea0]

Also known as: Arnie, Flighty

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

White

Jewels

19j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1981

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