Seiko Cal. 3847 - 640

The Seiko 3847-640 represents an important milestone in Seiko's 1980 lineup. Powered by the 3847 caliber with 19j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-283b50d3af35]

Also known as: Pogue, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

13.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1980

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