Great memory! Yes, I found a Marcos Aurelius roman denarius under the couch cushion, it was in the old coin card. No history on the coin shop printed on the card. My wife was scurrying to ready the livingroom for home church when she found it under a cushion while vacuuming. My wife vacuumed there every Week. We had few visitors to our home and about 8 at church. No one had a clue where it came from. We still have the coin and regard it as one of the signs and wonders that happened in that timeframe.
Another tip from our local historians saying the coin was used by several businesses, though they did not give a clear picture on dates, it's fairly clear it was back in the Depression era.