Seiko Cal. 6651 - 838

This Automatic model from 1970 features a 37mm Hardlex-Coated Steel case. Powered by the 6651 caliber with 32j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-78d7286b72f6]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1970

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