Seiko Cal. 3815 - 591

The 3815-591 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3815 caliber with 30j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-ed8461ab37d8]

Also known as: Monster, UFO

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

14.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Burgundy

Jewels

30j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1983

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