I was talking to my electrician and we figured it was 6.8amps at 230v 3 phase, so I think I'll get a 3 horsepower VFD just to be safe. Thanks for the input.
I am also trying to figure out whether I want to get one of the VFDs that feature Sensorless Vector Control, like the Teco CV-2003-H1 or stick with the Teco FM50-203-C, which is about $100 less.
Do the Sensorless Vector VFDs benefit those trying to use older motors like mine? It was made by Reuland Electric Co. of Industry California, BTW. I expect to just run the VFD at 60 hz while the motor and Reeves Drive holds up, but may eventually go direct belt drive and use the VFD for speed control if it seems less problematic down the line. Since I will be paying an electrician to help me, I'd like to cry once and get something that'll serve well into the future.
I took another swing at it with the cellphone camera and managed to get a legible image of the ID plate. It says the motor uses 6.2 amps at 220 volts 3 phase but no mention of Full Load.