I recently found out about and purchased a set of cards called Tall Stacks which depicted different types of steamboats and other types of riverboats. At first I thought it was obvious they went into non-sport under the transportation heading. Now after getting them, it tells the history of the boat, what type, all the specs, current use and even the owner and captain. I'm not so sure it would better be placed into historical.
https://www.ebay.com/itm/Complete-Set-of-20-Tall-Stacks-River-Boats-Collectors-Edition-Trading-Cards-/110776304177
It actually has 24 cards including the advertising cards, but this is an idea of the front. Again the front makes it look like a clear cut transportation, but I still wonder if its more apt to historical. From my understanding, there was a festival in Cincinnati call Tall Stacks that began in 1988 and was an annual event for many years. The 1992 event expanded to a 4 day event and one of the events was a race between the Delta Queen and the Belle of Louisville (the reason I got the cards in the first place). It doesn't really seem to reference the festival but I would imagine these were made for this event.
So which should it be listed under, historical or transportation? I will add the checklist and scans once it is figured out. It might take a while but I'll get it done.
Royal Card Review is my blog if you feel like checking it out, thanks if you do!- royalcardreview.blogspot.com/
In the process of updating my collection so don't trust any of my lists right now.