Seiko Cal. 5668 - 640

Seiko 5668-640

The 5668-640 is a sought-after Solar piece from Seiko's golden era. Powered by the 5668 caliber with 31j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-c6aa87e0feef]

Also known as: Bellmatic

Specifications

Movement
Solar
Case Material
Gold-Plated
Case Width
40mm
Case Thickness
9.4mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
80m
Dial Color
Navy
Jewels
31j
Frequency
21,600 bph
Power Reserve
64 hours
Year
1986

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