@Don McErlean posted:My reference that I used is Greenberg's Guide to Lionel Trains, 1901-1942: Volume II, edited by Christian F. Rohlfing. This is dated 1988 and is a revised edition of Volume I.
Don thanks for this reminder. I tend to just default to my TCA Standard of the World book. And I neglect to look at my Greenbergโs Guide. Yes, this has a whole lot more information such as 8 different variations discussed. I will have to leave this book on top of my bookcase rather than in it. LOL