Here are two advertising postcards showing Diamond products. The top one is from the 1950's and the bottom one is from the 1960's. In the top one you can see the products behind the salesman showing the screw eyes. The bottom shows the expansion bolt and their popular Wing Ding toggle bolt. They had earlier patents for toggle bolts but this popular design was US2616327A granted 11/04/1952. Basically what most of the toggle bolts are based on today. Hope you enjoyed these pictures. Take care to all.