Seiko Cal. 6378 - 715

This Spring Drive model from 1966 features a 40mm Stainless Steel case. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-1773918ee0f9]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

100m

Dial Color

Black

Jewels

23j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1966

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