CONTEMPORARY HANDMADE, Mark Matthews. Interesting collaboration marble. When Mark makes his marbles, he always saves the nubs that are cut off. In 2013 he had John McCormick remelt some of the nubs and run them through his marble making machine (based on the M.F. Christensen design). These marbles were signed by Mark and carry the initials JM to indicate they were made on the machine. Signed "Matthews JM 2013". This is the last one in the consignment that we have. You can see that it has the numbers from Mark's very recognizable Banded Lutzes. 1-3/16". Mint (9.9).