it's an Advance Design model, plug the full vin# in here for details - "first series" only applies to the Advance Design styled 1955 model, there was also a "2nd series" 1955, the Task Force style ... don't understand the "3.5 or 3.8", 3800 is the model number

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