Seiko Cal. 6638 - 263

The Seiko 6638-263 represents an important milestone in Seiko's 1970 lineup. The Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-105713b1279c]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

80m

Dial Color

Champagne

Jewels

28j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1970

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