Seiko Cal. 3857 - 128

The Seiko 3857-128 represents an important milestone in Seiko's 1979 lineup. Powered by the 3857 caliber with 24j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-12cde9de2f3e]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Silver

Jewels

24j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1979

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