I recently picked up a nice copy of the 1939 D & M Spring & Summer Sports Equipment Catalogue.
My interest is mostly because it has two pages that prominently feature Johnny Vander Meer endorsed equipment. D & M and Goldsmith both got Vander Meer to sign endorsement deals following his noteworthy 1938 rookie season when he pitched an unprecedented back-to-back no-hitters on 6/11/38 and 6/15/38.
It's a cool catalogue to look through. Here are a few pictures for those of you that may be interested...