Seiko Cal. 6381 - 924

This Spring Drive model from 1978 features a 39mm Hardlex-Coated Steel case. Powered by the 6381 caliber with 17j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-3f7548cadd60]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

17j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1978

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