Seiko Cal. 6231 - 409

The 6231-409 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6231 caliber with 18j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-66b664287498]

Also known as: Monster, Sumo

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

37mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1993

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