Tom,I completely forgot about the HP's. While I never used a 3810 or 3820, we did have a 3800 we used when the distances were short or the Model 8 Ge...

Matt,That's it. A big yellow box. One of my colleagues said it was great to sit on. I'm guessing that was the only American made TS.

They are not the ones. This company was not a distributor but a manufacturer.