Seiko Cal. 3831 - 447

The 3831-447 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3831 caliber with 22j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-7cfe1b5333fb]

Also known as: Helmet, Rally

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

13.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Cream

Jewels

22j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1979

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