Vintage 1960s Pickering print ad

This is an especially arcane inquiry, but I am searching for a vintage ad for Pickering Cartridges which was published more than once in High Fidelity in the mid-1960s (perhaps other journals too). It depicts ten famous composers gathered together, including Bach, Handel, Mozart, Schubert, Schumann, Wagner, Liszt, Brahms, Tchaikovsky, but with Beethoven at the front, holding an ear trumpet and asking WAS? The text heading beneath the drawing reads: "Nine out of ten musical people prefer the sound of Pickering," with poor Ludwig, of course, being in no condition to vouch for any sonic qualities. I have a sepia version published in the May 1965 issue, but I distinctly recall a full color version being printed in later issues. Can anyone direct me to a specific issue of HF or other periodicals where this can be found? Any assistance is most appreciated.

Try an ephemera dealer.
Check ebay. I found an Allied Radio catalog from the late sixties for a pittance.