Seiko Cal. 6657 - 820

This Quartz model from 1999 features a 36mm Two-Tone case. Powered by the 6657 caliber with 20j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-6f79cd2e49b0]

Also known as: UFO, Crown

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

36mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Cream

Jewels

20j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1999

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