Seiko Cal. 3847 - 631

Seiko 3847-631

The 3847-631 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3847 caliber with 33j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-9950d17be94a]

Also known as: Bellmatic

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
37mm
Case Thickness
12.4mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
200m
Dial Color
Blue Sunburst
Jewels
33j
Frequency
21,600 bph
Power Reserve
49 hours
Year
1986

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seikata-wm-9950d17be94a