1973. Shot by Shawn in store. (Though it’s a little tough to shoot something printed on foil.)
c. late 1960s? A generic/all-purpose sleeve for an educational company producing sheet music paired with a recording of the work without the soloist part (eg. a piano concerto without piano) so a musician can play along with it.
Wow, these are like phototype specimens. 1963 and 1964, respectively.