Today I went to a local store that sells a little bit of everything including trains though this Summer they cleared out the large scale because it was a poor seller due to being over priced. For example they have a Bachmann green 2-4-2 “Lynn” on Clearance for $210. It was $400 at one time.
Anyways they still have large scale and Lionel in a Christmas display and on this setup was a black and red LGB stainz. I stooped down to have a better look as it went by and a salesman asked me if I had any questions. I said no but I was admiring that rare colour scheme on that stainz and it has sound too! He said it does? He pulled it off the track and I showed him the speaker enclosure in the cab and the 3 way switch on the back of the fire box. I switched it, he hit the power and sure enough it had sound.
Thank you Merry Christmas ! It’s kinda funny when people don’t know what they have.