Seiko Cal. 5616 - 663

The Seiko 5616-663 represents an important milestone in Seiko's 1973 lineup. With its 20mm lug width and 14.0mm profile, it sits comfortably on most wrists. [seikata-wm-ca0e01888a10]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Navy

Jewels

26j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1973

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