Seiko Cal. 4431 - 807

Seiko 4431-807

This Hand-Winding model from 1985 features a 37mm Titanium case. Powered by the 4431 caliber with 30j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-3e4d9b725152]

Also known as: Sportsmatic

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
37mm
Case Thickness
8.1mm
Lug Width
22mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
100m
Dial Color
Black
Jewels
30j
Frequency
36,000 bph
Power Reserve
51 hours
Year
1985

Related Models

seikata-wm-3e4d9b725152