Seiko Cal. 6638 - 210

Seiko 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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