Seiko Cal. 4425 - 231

The 4425-231 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4425 caliber with 20j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-948fe5cd1f79]

Also known as: Tuna, Silverwave

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

White

Jewels

20j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1977

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