Seiko Cal. 3870 - 819

The Seiko 3870-819 represents an important milestone in Seiko's 1975 lineup. Powered by the 3870 caliber with 25j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-f0f16956893f]

Also known as: Helmet, Rally

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

11.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

110m

Dial Color

White

Jewels

25j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1975

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