Seiko Cal. 6620 - 991

The Seiko 6620-991 represents an important milestone in Seiko's 1981 lineup. Powered by the 6620 caliber with 27j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-438f84aa3a2c]

Also known as: Arnie

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

38mm

Case Thickness

11.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Silver

Jewels

27j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1981

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