Seiko Cal. 5631 - 844

The 5631-844 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5631 caliber with 36j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-8fe6f91a74e4]

Also known as: Arnie

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1975

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