Seiko Cal. 6620 - 740

The Seiko 6620-740 represents an important milestone in Seiko's 1990 lineup. Powered by the 6620 caliber with 30j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-9cd9e72dfceb]

Also known as: Samurai, Tuna

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Navy

Jewels

30j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1990

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