Seiko Cal. 4587 - 936

Seiko 4587-936

This Spring Drive model from 1978 features a 43mm PVD Black case. Powered by the 4587 caliber with 18j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-5303ae5f7d6a]

Also known as: Sumo

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
43mm
Case Thickness
8.4mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
100m
Dial Color
Silver
Jewels
18j
Frequency
36,000 bph
Power Reserve
48 hours
Year
1978

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