Seiko Cal. 6638 - 217

The 6638-217 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6638 caliber with 31j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-50fd3ea33031]

Also known as: Crown, Arnie

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Cream

Jewels

31j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1970

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