Seiko Cal. 3857 - 978

The 3857-978 is a sought-after Spring Drive piece from Seiko's golden era. With its 19mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-34ed990ce62a]

Also known as: Helmet, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

18j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1995

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