Seiko Cal. 3898 - 660

The 3898-660 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 3898 caliber with 20j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-5b6c7f9e5fcb]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

140m

Dial Color

Champagne

Jewels

20j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1967

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