Seiko Cal. 4427 - 731

Seiko 4427-731

This Automatic model from 1973 features a 38mm Gold-Plated case. Powered by the 4427 caliber with 22j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-df37ed3d2ce4]

Specifications

Movement
Automatic
Case Material
Gold-Plated
Case Width
38mm
Case Thickness
8.2mm
Lug Width
20mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
200m
Dial Color
Silver
Jewels
22j
Frequency
28,800 bph
Power Reserve
68 hours
Year
1973

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