Seiko Cal. 6639 - 668

Seiko 6639-668

The 6639-668 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6639 caliber with 28j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-7face9cfd65f]

Also known as: Baby Tuna

Specifications

Movement
Kinetic
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
13.4mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
130m
Dial Color
Champagne
Jewels
28j
Frequency
21,600 bph
Power Reserve
53 hours
Year
1982

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