Seiko Cal. 5638 - 171

Released in 1975, the Cal. 5638 with design code 171 was part of Seiko's domestic market collection. It features a Cream dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-d2b3b0bd5df9]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

9.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

30m

Dial Color

Cream

Jewels

29j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1975

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