It has to be from 1970/71 as I still have my first machine and it has the same print on the case. The machine looks almost like mine too. Mine is a Penncrest made exclusively for J C Penneys. Your's I bet was made exclusively for Speigel but by the same manutacturer. Back in the day J C Penneys and Speigle were top mail order catalogue companies along with Sears.