Seiko Cal. 6638 - 131

The Seiko 6638-131 represents an important milestone in Seiko's 1969 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-044849d20f80]

Also known as: Samurai, World Timer

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

41mm

Case Thickness

10.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1969

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