Seiko Cal. 5631 - 811

Released in 1986, the Cal. 5631 with design code 811 was part of Seiko's domestic market collection. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-3dee9aaf092a]

Also known as: Monster, Arnie

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Silver

Jewels

17j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1986

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