Seiko Cal. 4564 - 231

The Seiko 4564-231 represents an important milestone in Seiko's 1981 lineup. Powered by the 4564 caliber with 31j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-a12328a91eb5]

Also known as: Sea Horse

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1981

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