Seiko Cal. 3847 - 666

The 3847-666 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3847 caliber with 35j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-c93a2bd6f9c4]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

12.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Black

Jewels

35j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1998

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