Seiko Cal. 4431 - 501

Seiko 4431-501

The 4431-501 is a sought-after Solar piece from Seiko's golden era. Powered by the 4431 caliber with 20j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-73d5c18ec60e]

Also known as: Helmet, Navigator

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
10.4mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
70m
Dial Color
Navy
Jewels
20j
Frequency
21,600 bph
Power Reserve
68 hours
Year
1980

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seikata-wm-73d5c18ec60e