the R329's come with different variations to the frame info on back....
here is my info on them..... were issued ca.1938 by a Cincinnati plastics company named Clopay, who were more well known as makers of cheap window blinds.
There are at least 2 different backs known, the more common one has a Dayton St. address, the other issued later listed Clopay Sq. as the address and originally has an ad for a shoe company on the tear away section
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