Seiko Cal. 5616 - 431

The Seiko 5616-431 represents an important milestone in Seiko's 1977 lineup. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-3b5a7661f735]

Also known as: UFO

Specifications

Movement

Solar

Case Material

Titanium

Case Width

39mm

Case Thickness

14.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1977

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