Exchange puzzle from John Ergatoudis at IPP 22 in Antwerp in 2002.Designed and produced by Jean-Claude Constantin.Sorry for the spoilers, but it is still in the original shrinkwrap.The puzzle is located in the United States, but I will ship worldwide.Customs forms for international shipments will reflect actual payments.Payments can be made through PayPal (Friends & Family preferred).Buyer to pay shipping calculated after auction.Please wait for the updated invoice before making payment.