Seiko Cal. 6620 - 591

The Seiko 6620-591 represents an important milestone in Seiko's 1970 lineup. Powered by the 6620 caliber with 30j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-c881dfa39496]

Also known as: Monster

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

10.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

130m

Dial Color

Burgundy

Jewels

30j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1970

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