Seiko Cal. 5631 - 459

The 5631-459 is a sought-after Solar piece from Seiko's golden era. Powered by the 5631 caliber with 20j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-12ca27b532d1]

Also known as: Monster, Emperor

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

40mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

20j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1973

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