Seiko Cal. 3857 - 821

This Spring Drive model from 1981 features a 46mm PVD Black case. Powered by the 3857 caliber with 23j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-337aa45d2301]

Also known as: Rally

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Green

Jewels

23j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1981

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