The on-sale date is from the publication date recorded in the Catalog of Copyright Entries, Third Series, Vol. 1, Part 2, Nos. 1&2, Periodicals, 1946-1947.
The artwork, especially the unrealistic horses are exact matches, almost like traced copies of horses found in Krigstein's stories in #81 and #84.
Originally credited to Gus Ricca, but there are none of his broad rounded chins and jaws, or squinting eyes. Compare Ibis in #86.