I had this piece walk in the door today. I get the craziest things that walk into my store. This was a test planchet authorized by the US mint but produced by the German corporation VDM as a possible option for the SBA dollar planchets. It's a clad of nickel and copper nickel. It was however scrapped because the planchets were expensive and also because VDM owned exclusive rights to their manufacture. 18 pieces were produced and handed out to a house subcommittee during the Historic Preservation & Coinage hearings held by the U.S. House of Representatives on May 31, 1978. All 18 pieces were then sold to a coin dealer by a member of the subcommittee. My piece is accompanied by it's INS paperwork. It doesn't look like much... but it's definitely a rare bird. Included is a clipping of the auction catalog it was sold in in 1985.