Seiko Cal. 6657 - 880

The 6657-880 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6657 caliber with 26j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-eec4dcf5e18e]

Also known as: Navigator, Crown

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

14.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

26j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1967

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