Seiko Cal. 6658 - 271

This Hand-Winding model from 1973 features a 40mm Hardlex-Coated Steel case. Powered by the 6658 caliber with 34j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-6bf087d8ab44]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

15.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Cream

Jewels

34j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1973

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