I new these were USA made. "Tennsmith" spelled that way got me looking around. They are made 3 hours west of me in McMinnville, TN. I called to see what support was like. A lady answered the phone. Told me to call back with the S/N and they will give me the history. Same parts for decades. Turns out, they own Pextco which is the one Scott posted up. Bought them in 2011.
The lady on the phone asked what I paid for it. Told her. "Killer deal" was her response. They have 1 used one for $5k OTD.