Seiko Cal. 4487 - 307

Seiko 4487-307

This Quartz model from 1981 features a 36mm Gold-Plated case. Powered by the 4487 caliber with 21j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-b5ef581911d8]

Also known as: Monster, Crown

Specifications

Movement
Quartz
Case Material
Gold-Plated
Case Width
36mm
Case Thickness
8.8mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
70m
Dial Color
Silver
Jewels
21j
Frequency
21,600 bph
Power Reserve
61 hours
Year
1981

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seikata-wm-b5ef581911d8