Seiko Cal. 6658 - 636

The 6658-636 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6658 caliber with 27j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-3b687e8cfeeb]

Also known as: Samurai, Helmet

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

9.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

150m

Dial Color

Champagne

Jewels

27j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1987

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