Seiko Cal. 6638 - 866

The 6638-866 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6638 caliber with 18j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-64519ca9f7bd]

Also known as: Golden Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

9.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1969

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