Seiko Cal. 5231 - 656

The Seiko 5231-656 represents an important milestone in Seiko's 1988 lineup. Powered by the 5231 caliber with 35j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-7a8d52648e36]

Also known as: Monster, Helmet

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

15.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1988

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