Seiko Cal. 6617 - 554

The Seiko 6617-554 represents an important milestone in Seiko's 1966 lineup. The Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-08a3973d3a7b]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

27j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1966

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