Seiko Cal. 4427 - 639

Seiko 4427-639

This Automatic model from 1971 features a 42mm Two-Tone case. Powered by the 4427 caliber with 29j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-5786ba9f3166]

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
42mm
Case Thickness
15.4mm
Lug Width
20mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
160m
Dial Color
Black
Jewels
29j
Frequency
36,000 bph
Power Reserve
44 hours
Year
1971

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seikata-wm-5786ba9f3166