Russell Wright Manufacturing history  

I've been in the market for more dinnerware and today I bought some vintage Russell Wright. I was just wondering the different manufacturers he has used and the general timeline.

I bought a mix of 11 plain white and powder blue dinner plates for $50, a stacking cream/sugar set for $15, and the circular squatty salt/pepper set for $12. They were manufactured by Iroquois. Was this a good deal?

I have seen his stuff by American Modern, Iroquois, one other name I can't recall, and the newer Oneida (which I have heard is made rather poorly and easily breaks).

Anyone know the correct history here, and the value differences regarding the manufacturer?