Seiko Cal. 4440 - 520

The Seiko 4440-520 represents an important milestone in Seiko's 1971 lineup. With its 21mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-9e81791b19ae]

Also known as: Baby Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

45mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Navy

Jewels

19j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1971

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