3 Vintage Copper Ingot Smelter Cross's 1940s-50s

These were made at the Kennecott smelter in Hurley, N.M. around 1940- 50s. Each are of the same length and width, 6" long  3 3/4" wide. The thickness varies. The dark Reddish is a bit thicker than the other two. Weigh between 2-2 1/2 lbs. Please view the pics. for detail and ask any questions. These are rare and not bought at any store. Thanks for viewing.