Seiko Cal. 6637 - 688

Seiko 6637-688

The 6637-688 is a sought-after Solar piece from Seiko's golden era. Powered by the 6637 caliber with 35j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-547b6682fa8b]

Also known as: Sea Horse

Specifications

Movement
Solar
Case Material
Gold-Plated
Case Width
38mm
Case Thickness
15.1mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
170m
Dial Color
Silver
Jewels
35j
Frequency
28,800 bph
Power Reserve
70 hours
Year
1973

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