Seiko Cal. 6378 - 957

The 6378-957 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6378 caliber with 35j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-15dd6c67cf3b]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1982

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