Seiko Cal. 4478 - 637

Seiko 4478-637

The 4478-637 is a sought-after Hand-Winding piece from Seiko's golden era. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-f133f91bdf70]

Also known as: Goldfeather, Flighty

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
42mm
Case Thickness
10.6mm
Lug Width
20mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
90m
Dial Color
Blue Sunburst
Jewels
36j
Frequency
21,600 bph
Power Reserve
39 hours
Year
1993

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