I found these going through a bag of slot covers and connectors. I knew that a lot of the early AT cards were too tall to fit into an XT case, but I thought that the slots themselves were the same heights. Did I miss something during the 286 era?
Nope, those two are about an inch longer than they should be. I would think they came from the same case, two serial and one parallel, but it would be an oddball case. A normal cover isn't long enough for two 25 pin connectors, they usually have a long and a short, like a parallel and a game port, or a 25 pin serial with a 9 pin serial.