Seiko Cal. 6638 - 518

The Seiko 6638-518 represents an important milestone in Seiko's 1972 lineup. Powered by the 6638 caliber with 22j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-d027100db7a6]

Also known as: Crown

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Burgundy

Jewels

22j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1972

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