Thank you Bob I stand corrected ...at least in the 1937 Alexander catalog ..they do mention the cast frame ..and yes tender drive ....... earlier Alexander's I believe are a different beasts.... 1930-32 +- catalogs .. showing the Icken -Baker line ..no mention of cast frames or tender drive ....
Alexander offering both outside or inside 3rd rail in the early period ....yes they did swing both ways
cheers Carey