Music Treasures Of The World

A high fidelity subscription series / They did significant business with / as well as a part owner of acted as consultant and repertory director for two mail-order record companies, & / The 45 rpm sets look to have been mastered and manufactured by RCA as they have a sequence of matrix #'s that are similar. These all seem to be available starting in 1954; an advertisement for them appeared in the Life Magazine issue of Oct 11, 1954.