Seiko Cal. 6637 - 668

The 6637-668 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6637 caliber with 34j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-4d0a5eb30e89]

Also known as: Turtle, Flighty

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

34mm

Case Thickness

14.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

34j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1979

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