Seiko Cal. 6638 - 935

The 6638-935 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6638 caliber with 17j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-508384557e1d]

Also known as: Navigator, Emperor

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

White

Jewels

17j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1977

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