Seiko Cal. 5231 - 764

The 5231-764 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5231 caliber with 26j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-67442c8ee412]

Also known as: Monster

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

8.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Cream

Jewels

26j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1969

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