Seiko Cal. 4431 - 433

Seiko 4431-433

This Hand-Winding model from 1979 features a 40mm Two-Tone case. The Fixed bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-31232be565d5]

Also known as: Monster, Sportsmatic

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
40mm
Case Thickness
13.9mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
180m
Dial Color
Burgundy
Jewels
17j
Frequency
21,600 bph
Power Reserve
43 hours
Year
1979

Related Models

seikata-wm-31232be565d5