Seiko Cal. 3830 - 620

The 3830-620 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3830 caliber with 34j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-a2fed956f544]

Also known as: Monster, Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Champagne

Jewels

34j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1985

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