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Pocket Library PL37, 1957

For this book cover, two very similar copperplate scripts have been paired: While the editor's name is set inBank Script, the rest is inCommercial Script. A possible reason is that maybe the latter was simply not available at a bigger size. Note that this is from the 1950s, when type was not as easily scalable as it is today. Also, the former has fancier capitals.