Seiko Cal. 5616 - 661

The Seiko 5616-661 represents an important milestone in Seiko's 1973 lineup. With its 21mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-a1cb46ea6c08]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1973

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