Seiko Cal. 4456 - 937

Seiko 4456-937

The 4456-937 is a sought-after Spring Drive piece from Seiko's golden era. The Bidirectional bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-8deffde0116c]

Also known as: Sumo, Bullhead

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
35mm
Case Thickness
10.7mm
Lug Width
18mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
40m
Dial Color
Cream
Jewels
36j
Frequency
21,600 bph
Power Reserve
42 hours
Year
1970

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