Seiko Cal. 6657 - 830

Seiko 6657-830

The Seiko 6657-830 represents an important milestone in Seiko's 1976 lineup. Powered by the 6657 caliber with 21j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-e58416c62593]

Also known as: Turtle, Bullhead

Specifications

Movement
Quartz
Case Material
Stainless Steel
Case Width
46mm
Case Thickness
15.9mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
100m
Dial Color
Champagne
Jewels
21j
Frequency
36,000 bph
Power Reserve
41 hours
Year
1976

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seikata-wm-e58416c62593