Seiko Cal. 6638 - 264

The Seiko 6638-264 represents an important milestone in Seiko's 1980 lineup. Powered by the 6638 caliber with 27j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-9be953ff6b85]

Also known as: Turtle, Goldfeather

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

White

Jewels

27j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1980

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