I’ve seen catalogs before from small press SF publishers published in the 1940’s and 1950’s. But I’ve never seen one that had inserts like this one does. This is the Fantasy Press Books catalog for 1950-1951. Inside the catalog itself were three color inserts, advertising “Masters of Time” by A.E. van Vogt, “The Bridge of Light” by A. Hyatt Verrill and “Genus Homo” by L. Sprague de Camp & P. Schuyler Miller. Since these are just laid in, I assume that most copies of the catalog have probably lost them over time. This set, however, remains intact, and will be auctioned as part of the first part of the Robert Weinberg Estate Auction being held at the 2019 Windy City Pulp and Paper Convention (April 12-14, 2019 at the Westin Lombard Yorktown Center). The auction will be held on the evening of Friday, April 12, 2019.