Seiko Cal. 7181 - 831

Seiko 7181-831

This Hand-Winding model from 1980 features a 45mm Hardlex-Coated Steel case. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-636b2385e7c5]

Also known as: Helmet

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
8.1mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
200m
Dial Color
Green
Jewels
20j
Frequency
21,600 bph
Power Reserve
49 hours
Year
1980

Related Models

seikata-wm-636b2385e7c5