Seiko Cal. 4420 - 680

Seiko 4420-680

This Quartz model from 1980 features a 35mm Hardlex-Coated Steel case. Powered by the 4420 caliber with 31j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-e504ff80ab40]

Also known as: Crown, Baby Tuna

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
35mm
Case Thickness
8.2mm
Lug Width
19mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
80m
Dial Color
Blue Sunburst
Jewels
31j
Frequency
36,000 bph
Power Reserve
46 hours
Year
1980

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