Seiko Cal. 5656 - 728

The Seiko 5656-728 represents an important milestone in Seiko's 1977 lineup. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-9dae99fb06ed]

Also known as: Tuna, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

14.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1977

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