Seiko Cal. 3847 - 427

The 3847-427 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3847 caliber with 32j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-b21e2f24aab8]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

120m

Dial Color

Navy

Jewels

32j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1980

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