Seiko Cal. 6638 - 866

Seiko 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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seikata-wm-64519ca9f7bd