Seiko Cal. 5617 - 257

Released in 1973, the Cal. 5617 with design code 257 was part of Seiko's domestic market collection. The Bidirectional bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-c6ab5ef9a262]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1973

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