My late husband purchased a Little River RR Shay engine in G scale. I've been putting all of his train stuff on eBay, and I've been asked about this train and I have no idea how to find answers. I was told to try this forum. How can you tell if one of these engines has sound or not? I was also asked to find the serial number on it, but I can't find anything except the Bachmann name and "made in China". Any ideas on how I can find these answers>? Thank you, Sandra J.