Seiko Cal. 5646 - 587

Seiko 5646-587

This Spring Drive model from 1970 features a 46mm Hardlex-Coated Steel case. Powered by the 5646 caliber with 23j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-5d4388e17db5]

Also known as: Monster, Goldfeather

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
46mm
Case Thickness
8.3mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
90m
Dial Color
Blue Sunburst
Jewels
23j
Frequency
36,000 bph
Power Reserve
39 hours
Year
1970

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