Seiko Cal. 4447 - 660

The Seiko 4447-660 represents an important milestone in Seiko's 1976 lineup. With its 20mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-e3cd3b510d42]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

25j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1976

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