Seiko Cal. 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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