Seiko Cal. 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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