Discovered Jazz and Swing in middle school and have been a fan ever since. Collecting 78s, which I started about 35 years ago, has helped me expand my musical horizon. One of my areas of interest is now also the "ethnic" or foreign-language music on shellac that Columbia, Victor, and many other labels produced for immigrants to the United States between the 1910s and 1950s.
I couldn't either, but yours are readable, and both have the same sub-variety ii of the Gold Band label with six patents in one long line. This style was used with label printing date code FY (June 1918) to DX (= April 1919).
The first 146 pop titles in the series were announced for January 1956 in Billboard, December 31, 1955, pages 10 & 12.
The new matrix numbers, starting with F = 1955, reflect the fact that RCA Victor engineers remastered these reissues, starting in 1955.