Seiko Cal. 6378 - 256

This Hand-Winding model from 1966 features a 34mm Gold-Plated case. Powered by the 6378 caliber with 18j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-cd4d02400b82]

Also known as: Tuna, Arnie

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

13.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Navy

Jewels

18j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1966

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