Seiko Cal. 6617 - 555

The Seiko 6617-555 represents an important milestone in Seiko's 1980 lineup. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-e346d5ba688a]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1980

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