Seiko Cal. 5631 - 964

Seiko 5631-964

The 5631-964 is a sought-after Solar piece from Seiko's golden era. Powered by the 5631 caliber with 23j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-4edda67b809b]

Specifications

Movement
Solar
Case Material
Gold-Plated
Case Width
44mm
Case Thickness
9.4mm
Lug Width
22mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
190m
Dial Color
Navy
Jewels
23j
Frequency
28,800 bph
Power Reserve
61 hours
Year
1977

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