Seiko Cal. 6378 - 778

This Hand-Winding model from 1981 features a 45mm Two-Tone case. Powered by the 6378 caliber with 18j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-82ca631b7d7f]

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

80m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1981

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