Ginastera, Alberto. (1916 - 1983). [Op. 12]. Preludios Americanos para piano. Musical manuscript. Buenos Aires, 1944. . Folio (364 x 270 mm.) Green paper wrappers with titling in manuscript to upper. Collective and individual titles in Spanish, French and English, [4] (blank), 5-27 manuscript music (paginated in manuscript from page 3). Dated at foot of final page. Notated in ink on 14-stave paper imprinted Marca'Clave' No. 3714 Ind. Arg." A fair copy in an accomplished hand, executed either before or contemporaneously with the first edition of 1946 and very likely under the supervision of the composer. Wrappers quite worn, browned, frayed and chipped at edges. Slightly browned; creased at corners.

The 12 Preludios are a significant work dating from Ginastera's early period; they were written as part of a tribute to composers such as Aaron Copland and Heitor Villa-Lobos.