Seiko Cal. 6657 - 336

The Seiko 6657-336 represents an important milestone in Seiko's 1991 lineup. Powered by the 6657 caliber with 25j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-926b7c915e6d]

Also known as: Monster, Navigator

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

44mm

Case Thickness

13.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

Cream

Jewels

25j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1991

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