Seiko Cal. 4431 - 337

Seiko 4431-337

The 4431-337 is a sought-after Quartz piece from Seiko's golden era. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-1ec5f324db95]

Also known as: Monster, Tuna

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
45mm
Case Thickness
13.8mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
110m
Dial Color
Cream
Jewels
31j
Frequency
36,000 bph
Power Reserve
44 hours
Year
1999

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