The Single/Double/Triple Diamond cards for Diamond Jo were brought out after my visit there in the first week of March (when they were still issuing the "tiger-stripe" cards) and before the end of May, when I first had a chance to get them. I don't know what cards were supposed to be issued in January, as these were most assuredly in the time slot of March-May. I went back to the river a week before the convention and got some more of the Single/Double/Triple Diamond cards for trading, and then found the new cards at Dubuque Greyhound Park that were brand new releases in the month of July.