Seiko Cal. 4457 - 445

Seiko 4457-445

The 4457-445 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4457 caliber with 21j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-4fa431a9b890]

Also known as: Sumo, Sea Horse

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
42mm
Case Thickness
10.9mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
140m
Dial Color
Green
Jewels
21j
Frequency
36,000 bph
Power Reserve
38 hours
Year
1967

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