 More modern replicas , known as " Saigon copies " , were commonly offered as original at low prices to American soldiers during the Vietnam War . In Saigon and other South Vietnamese cities , as well in nearby Thailand , military personnel were offered the copies by vendors who sometimes claimed that they were family heirlooms . In 2012 , Professional Coin Grading Service founder David Hall stated that counterfeit 1804 dollars had been available in Hong Kong for decades . 
