Seiko Cal. 6657 - 863

The Seiko 6657-863 represents an important milestone in Seiko's 1979 lineup. Powered by the 6657 caliber with 26j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-1c6be0016ff5]

Also known as: Rally

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

14.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Cream

Jewels

26j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1979

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