Seiko Cal. 6658 - 817

The Seiko 6658-817 represents an important milestone in Seiko's 1987 lineup. The Fixed bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-eb1df19f21c1]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1987

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