Seiko Cal. 6620 - 739

The Seiko 6620-739 represents an important milestone in Seiko's 1985 lineup. Powered by the 6620 caliber with 25j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-194eaa6bcd52]

Also known as: Tuna, Rally

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1985

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