Seiko Cal. 5631 - 843

Seiko 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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