Seiko Cal. 3890 - 421

The 3890-421 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3890 caliber with 25j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-88040fc5eb96]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

White

Jewels

25j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1983

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