Seiko Cal. 6657 - 242

The Seiko 6657-242 represents an important milestone in Seiko's 1997 lineup. Powered by the 6657 caliber with 17j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-31f0030b75b5]

Also known as: UFO, Arnie

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

38mm

Case Thickness

9.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

17j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1997

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