Believed to be Mexican Monte from Richard Himber. As advertised in the July 1966 Genii Magazine:With Gold, Silver and Copper.The Big brain burst in with his usual entrance screaming, "I just showed Don Alan!"...."He like it so much that he bought two and your a genius!" "ALRIGHT funny man, " Himber snarled, "WATCH!" as he laid down a copper coin and silver coin and covered each with a playing card. "where's the copper coin?" Himber continued. I pointed and he turned over the card and sneered, "There are only two silver coins...no copper coins at all." Shaking out a gold coin from a luscious suede (here the pouch is brown leather) pouch he said, "Let's put this under the card." "Where is it?' he asked. I failed again as he STILL showed me two silver coins. He then placed the two silver coins in the empty pouch and out came two GOLD coins and only one SILVER coin. He laid the coins in my hand and asked me to examine the pouch and cards. "EXPLAIN THAT," he cracked, and then left. I love to rile whims it's then he does his best magic. I know it's the coins as HIMBER does not do slights, but I could find nothing wrong.