Seiko Cal. 6657 - 997

Seiko 6657-997

The Seiko 6657-997 represents an important milestone in Seiko's 1980 lineup. Powered by the 6657 caliber with 23j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-b54c7c01464b]

Also known as: Golden Tuna

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
38mm
Case Thickness
15.7mm
Lug Width
21mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
40m
Dial Color
Blue Sunburst
Jewels
23j
Frequency
21,600 bph
Power Reserve
59 hours
Year
1980

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