I think it was the Chessie Safety Express engine and was damaged in a fire while stored by Chessie. If it's the same engine it's in the B&O Museum now.
Interesting this is a topic. The RFD Channel had a train show today. Which featured a Reading Rambles (1985) with sister engine 2101. I was surprised that it was equipped with two different whistles. One was a high pitched squeaker. The other lower. Like a steamboat. Neat! Boxcab E50