Seiko Cal. 4431 - 240

Seiko 4431-240

The 4431-240 is a sought-after Hand-Winding piece from Seiko's golden era. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-e81d6fde514f]

Also known as: Turtle

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
14.0mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
180m
Dial Color
Blue Sunburst
Jewels
22j
Frequency
28,800 bph
Power Reserve
46 hours
Year
1999

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