The one with the black sockets it the newer revision board. ( i also could be wrong)
In the corner it says PAT.
Iam guessing max mem on this boards would be 1MB.. Because it only should take 41256 Kbit chips..
Special about these boards is, they are for reverseable AT cases.
Logo on the board seems familiar to me, when i think back to the past.
But i really cant remember which company did used that logo which is stamped om the PCB.