Seiko Cal. 3871 - 403

Seiko 3871-403

This Automatic model from 1970 features a 44mm Gold-Plated case. Powered by the 3871 caliber with 18j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-5e1cdb7b5e9c]

Also known as: Monster, Arnie

Specifications

Movement
Automatic
Case Material
Gold-Plated
Case Width
44mm
Case Thickness
11.3mm
Lug Width
18mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
70m
Dial Color
White
Jewels
18j
Frequency
28,800 bph
Power Reserve
54 hours
Year
1970

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