...if they are hand-painted, they are likely the original artwork used to make the billboard posters, and one-of-a-kind...they would have been photographed and enlarged considerably to create the posters, the sections of which would have been pasted on the billboards...
...exhibitions of poster artists' work were held, and the public could go and see the original paintings...the Outdoor Advertising Association held an annual competition for decades...they published a collection of the winners/honorable mentions for many years - starting as an annual issue of 'The Poster' in September, 1925, then as spiral-bound books...I have everyone from 1925-1960 except 1933 & 1939 😕...the exhibit of paintings were displayed in Chicago at Marshall Fields department store...
...N.C. Wyeth, George Petty, Haddon Sundblom, Leyendecker, and many others had their advertising work exhibited in this manner...
