Seiko Cal. 5638 - 444

Released in 1965, the Cal. 5638 with design code 444 was part of Seiko's domestic market collection. It features a Green dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-53a96ed60bd2]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

8.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1965

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