Seiko Cal. 5231 - 637

Seiko 5231-637

This Solar model from 1965 features a 40mm Gold-Plated case. Powered by the 5231 caliber with 23j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-18ba185a7a32]

Specifications

Movement
Solar
Case Material
Gold-Plated
Case Width
40mm
Case Thickness
13.0mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
40m
Dial Color
Burgundy
Jewels
23j
Frequency
21,600 bph
Power Reserve
38 hours
Year
1965

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seikata-wm-18ba185a7a32