Seiko Cal. 5631 - 843

The Seiko 5631-843 represents an important milestone in Seiko's 1991 lineup. Powered by the 5631 caliber with 33j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-be99daae424d]

Also known as: Golden Tuna, Flighty

Specifications

Movement

Solar

Case Material

Titanium

Case Width

43mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Navy

Jewels

33j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1991

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