Seiko Cal. 5661 - 928

The Seiko 5661-928 represents an important milestone in Seiko's 1967 lineup. With its 22mm lug width and 14.5mm profile, it sits comfortably on most wrists. [seikata-wm-a603f681870c]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1967

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