10c dime Mystery/detective magazine
Pulp magazines (often referred to as “the pulps”) are inexpensive fiction magazines published from 1896 through the 1950s. The typical pulp magazine was 7 inches (18 cm) wide by 10 inches (25 cm) high, 0.5 inches (1.3 cm) thick, and 128 pages long. Pulps were printed on cheap paper with ragged, untrimmed edges.
The term pulp derives from the cheap wood pulp paper on which the magazines were printed. Magazines printed on higher quality paper were called “glossies” or “slicks”. In their first decades, pulps were most often priced at ten cents per magazine, while competing slicks were 25 cents apiece.
I do so love the covers though.