Seiko Cal. 6638 - 210

The 6638-210 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6638 caliber with 28j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-2a56b9a61262]

Also known as: Tuna, Navigator

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1966

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