Seiko Cal. 6391 - 940

The 6391-940 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6391 caliber with 20j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-36aaf2179682]

Also known as: Sea Horse, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Cream

Jewels

20j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1982

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