47-55 is called the Advance Design series, like 55-59 is called the Task Force series [TF], GM advertising terms

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics