Seiko Cal. 6617 - 423

Seiko 6617-423

The 6617-423 is a sought-after Automatic piece from Seiko's golden era. The Inner Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-aa47c096266f]

Also known as: Tuna, Helmet

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
38mm
Case Thickness
12.8mm
Lug Width
21mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
80m
Dial Color
Champagne
Jewels
20j
Frequency
36,000 bph
Power Reserve
59 hours
Year
1994

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