Seiko Cal. 3857 - 420

The 3857-420 is a sought-after Spring Drive piece from Seiko's golden era. With its 21mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-8804016535d7]

Also known as: World Timer, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

9.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1979

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