Libra (1938) is an uncial typeface by Dutch designer S.H. de Roos. As an interpretation of uncial scripts as used from the 4th to 8th centuries, it has a single case only: to our modern eyes, some letters look like they’re capitals (B, R), whereas others have forms that follow the minuscule construction (a, h, m, n).
When “unicase” typefaces became fashionable in the 1960s, Don Schlitten picked Libra for the cover of an album with Appalachian folk music. The “songs, reels and child ballads” on Cumberland Moonshiner were sung by Tennessee musician Hamper McBee (here misspelled as MacBee), accompanied by Guy Carawan. The album was released in June 1964 by Prestige Folklore, a spin-off of Prestige Records.
[More info on Discogs]