Seiko Cal. 6638 - 383

The Seiko 6638-383 represents an important milestone in Seiko's 1986 lineup. It features a Cream dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-1c706ff8bf52]

Also known as: Turtle, Crown

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

18j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1986

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