This is a filter flo "which I'm sure most of u know" with a hotpoint rim flo hand wash agitator in it, the agitator must have been replaced somewhere along the line!
No that isn't a solid tub machine. If you look closely you can make out the holes in the tub. I wonder what happened to the original agi for that machine because you certainly can't use the filter pan on that 2 pc agi that's in there now.