Seiko Cal. 3831 - 447

Seiko 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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