Seiko Cal. 4437 - 618

Seiko 4437-618

This Spring Drive model from 1986 features a 41mm Hardlex-Coated Steel case. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-4effb9692015]

Also known as: Sumo, Shogun

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
14.5mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
170m
Dial Color
Blue Sunburst
Jewels
29j
Frequency
36,000 bph
Power Reserve
60 hours
Year
1986

Related Models

seikata-wm-4effb9692015