Seiko Cal. 3847 - 700

The 3847-700 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3847 caliber with 20j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-ad3a3ec6e7df]

Also known as: Helmet, Rally

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Burgundy

Jewels

20j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1981

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