Seiko Cal. 6639 - 717

Seiko 6639-717

The Seiko 6639-717 represents an important milestone in Seiko's 1993 lineup. Powered by the 6639 caliber with 27j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-3cce272c5d23]

Also known as: Rally, Baby Tuna

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
41mm
Case Thickness
9.4mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
190m
Dial Color
Black
Jewels
27j
Frequency
36,000 bph
Power Reserve
60 hours
Year
1993

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