Seiko Cal. 6378 - 258

The 6378-258 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6378 caliber with 28j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-cce77f4ba0fe]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

8.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

130m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1984

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