Took watch to Jewelers to have metal tested and it came back at over 70% Copper

Watch does not run when wound but does have main spring as shown
I try to take decent pictures but the glare makes it difficult. 
Serial numbers (5469544) match the case as well as the windings

20th Century W.C. Co
Warranted 20 Years as shown
Monogramed as shown on main cover
Double covers on back