Graham,
I'd suggest that you contact the Collection of Advertising History in
the Archives Center at the National Museum of American History
(Smithsonian Inst.). The Archives Center's e-mail address is:
[log in to unmask]
(Note: the Archives Center at NMAH is not to be confused with the
Archives Division at NASM).
Paul Silbermann
Paul Silbermann National Air and Space Museum
[log in to unmask] Archives Division
**************These opinions are mine, not NASM's**************