Seiko Cal. 5656 - 635

Seiko 5656-635

The 5656-635 is a sought-after Solar piece from Seiko's golden era. Powered by the 5656 caliber with 31j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-180a9967dc0a]

Also known as: Tuna

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
34mm
Case Thickness
8.4mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
90m
Dial Color
Green
Jewels
31j
Frequency
28,800 bph
Power Reserve
65 hours
Year
1967

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