According to the ACC D38 refers to Good Neighbor cards (24) from Bell Bakeries. I don't know why Burdick didn't classify the sets of Bell Baking cards individually, as he did the following number (D39-x) with Gordon Bread cards, but maybe he hadn't seen other series from Bell yet when the catalog was done? I had a Gordon Bread D39-8 already but guess I can cross off one I didn't know I needed

. Here below is a D39-8 Gordon's Bread - Speed Pictures baseball scene and a D38 Bell Bakery Speed Pictures baseball scene. The seller, who is a board member, threw 6 other non-baseball cards in for free!!