The Process That Led to the ‘Grill’ Stamps of the United States. From First Experiments to the Earliest Z-Grills by Jan Hofmeyr Frame 1 (102MB pdf) Frame 1 Click Images to see Enlarged Panels in Order from Left to Right & Top to Bottom Frame 1 Frame 1 (102MB pdf) Share the post "The Process That Led to the ‘Grill’ Stamps of the United States. From First Experiments to the Earliest Z-Grills" FacebookXShare…