This is the only copy I could find of this supplement catalog. Unfortunately it is a terrible photocopy but the information can still be read. The supplement catalog is dated July 1971. Provided by Thomas Kopp. Within the text is mentioned that they have planned for the new Chouinard catalog to be completed in September 1971. Other valuable info is also within the Improvements wordage. Plus this is the first mention of a nut named a Stopper. Hopefully someday somebody finds a cleaner copy of this great catalog.