Seiko Cal. 3887 - 378

Seiko 3887-378

The Seiko 3887-378 represents an important milestone in Seiko's 1984 lineup. Powered by the 3887 caliber with 18j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-02fa5af28e2d]

Also known as: Sumo, UFO

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
35mm
Case Thickness
9.1mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
70m
Dial Color
Cream
Jewels
18j
Frequency
36,000 bph
Power Reserve
46 hours
Year
1984

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