Más Allá, translated as Beyond, had a full run of 48 monthly issues published between 1953 and 1957 in Argentina.  It is fully in Spanish, with great color covers and B&W interior illustrations.  I have come upon a small collection of these magazines and will be listing them individually.  They are described similarly.  The covers show wear along the edges with small tears.  They show degradation of the paper spines at the bottom and top, but spine titles remain clear and legible.  All are solidly bound, with no interior marks.  Several have small interior sections of higher quality paper plates.  They measure 7.5" by 5.5" and have about 165 pages. 

This listing is for the Vol 1, No. 8, published in January 1954.

An overview of this magazine found online:

"Edited by the prolific Abril label, it emerged as a local franchise of the North American Galaxy Science Fiction, although his contribution could in no way be reduced to that of an epigone or avatar of that. Más Allá represented the first Argentine magazine dedicated to science fiction and scientific popularization that could be sustained over time throughout its 48 uninterrupted issues and that enjoyed a wide community of readers both in Argentina and in other speaking countries. Through its pages, stories of central authors of Anglo-Saxon hard science fiction circulated, as well as some pens that would end up consolidating themselves as the most outstanding and creative in literary terms: the Bradbury of the Martian Chronicles, Isaac Asimov, Theodore Sturgeon, Phillip K. Dick, Kurt Vonnegut, among others. Likewise, the magazine constituted a publication space for national authors. Héctor Germán Oesterheld published two stories there (one under the pseudonym of H. Sánchez Puyol) and according to the different versions it could have been from its director for a period to the one who was in charge of writing the small vignettes on scientific topics and curiosities . Other collaborators were Oscar Varsavsky, Pablo Capanna, Juan Pedro Edmunds, Ignacio Covarrubias, Adolfo Pérez Zelaschi, Maximiliano Mariotti and Claudio Paz, along with another portion of signatures. Local cartoonists such as J. Eusevi and Hugo Csecs also participated. The material of Beyond did not end in fiction; the magazine also devoted an important place to quality scientific dissemination. Fragments of books and articles occupied a constant portion of the index, under the pen of Willy Ley, Kenneth Heuer, Wernher von Braun, and even an Argentine physicist: José Westerkamp. A young Mario Bunge was in charge for a time of writing the answers to the scientific questions . The assiduous and varied exchange that Beyond proposed to its readers was certainly amazing, and constituted one of the great achievements of the publication. Undoubtedly, it represents an important chapter in the history of Argentine scientific and technical imagination."

B126