Seiko Cal. 3831 - 656

Seiko 3831-656

This Automatic model from 1987 features a 41mm Two-Tone case. Powered by the 3831 caliber with 33j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-c17f5b22595c]

Also known as: Baby Tuna

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
41mm
Case Thickness
12.4mm
Lug Width
20mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
170m
Dial Color
Burgundy
Jewels
33j
Frequency
21,600 bph
Power Reserve
44 hours
Year
1987

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