That must be it ! The part is listed at the Train Tender.
My Cd did not have that reference. The part number I gave is for the four wheel drive motors 166# group. It could be a modern number you have or the way it is listed now as an alpha part.. The first disc I have also has a prewar train list. The 2012 version is for sale on ebay three disc set. Olsen sells a set too.
What I found interesting was the intro to the prewar train list. It was formulated by TCA members in 1956 and updated.
So any records found are composed after market and not by the manufacturer. Something to think about.