Seiko Cal. 6620 - 321

The Seiko 6620-321 represents an important milestone in Seiko's 1971 lineup. With its 22mm lug width and 8.8mm profile, it sits comfortably on most wrists. [seikata-wm-fa94698aa91c]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Cream

Jewels

29j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1971

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