Do you have the number handy ... better still, maybe you can sell me yours
Here is the B-unit: https://www.lionel.com/product...l-b-unit-160-6-38204
I believe there may have been other releases of them, so there are probably other product numbers as well.
Would sell mine if not part of my son’s first train set. I’m guessing they’ll be some of the last to go when everything eventually gets sold off….