Seiko Cal. 5631 - 820

Seiko 5631-820

This Solar model from 1980 features a 43mm Gold-Plated case. Powered by the 5631 caliber with 18j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-ceafc1f37bd8]

Specifications

Movement
Solar
Case Material
Gold-Plated
Case Width
43mm
Case Thickness
12.0mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
30m
Dial Color
Navy
Jewels
18j
Frequency
28,800 bph
Power Reserve
38 hours
Year
1980

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