I received this recently part of a trade that included a number of experimental items. My first thought was that it was a garage "art" piece, but turns out it is legit.
View attachment US4034673 Folded SHCH Liner byorporation Buffalo NY 1977 (2) 2.pdfView attachment US4034673 Folded SHCH Liner byorporation Buffalo NY 1977 (2) 5.pdf
View attachment US4034673 Folded SHCH Liner byorporation Buffalo NY 1977 (2) 2.pdfView attachment US4034673 Folded SHCH Liner byorporation Buffalo NY 1977 (2) 5.pdf