Seiko Cal. 6231 - 587

The 6231-587 is a sought-after Kinetic piece from Seiko's golden era. The Fixed bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-22cc6ebeada5]

Also known as: Monster, Bellmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

10.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

White

Jewels

26j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1966

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