I think that Wiki's time line on the changes is incorrect. I tagged beef for a few years starting in 1965 and at that time there were Prime, Choice, and Good. The grade was based on quality and yield. I think it was around 1975 that good disappeared and select came into being. The standards were changed, and the yield factor was eliminated, I'm not 100% sure but I know good was around as long as I worked a packing house.
4/22/13 at 5:10pm