Seiko Cal. 6621 - 778

The Seiko 6621-778 represents an important milestone in Seiko's 1976 lineup. With its 22mm lug width and 14.9mm profile, it sits comfortably on most wrists. [seikata-wm-2a39b2df2ce0]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Navy

Jewels

25j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1976

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