Seiko Cal. 6661 - 520

The Seiko 6661-520 represents an important milestone in Seiko's 1979 lineup. Powered by the 6661 caliber with 21j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-10fb79fa9b0a]

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

36mm

Case Thickness

13.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1979

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