Seiko Cal. 3847 - 915

The Seiko 3847-915 represents an important milestone in Seiko's 1973 lineup. Powered by the 3847 caliber with 28j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-63b60e0260a4]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

11.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1973

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