I will try to get you a couple of pics of mine in the next few days.
The one on my single axle was installed as soon as I bought the truck. I didn't have a lot of confidence in the attachment to start with, but I had complete confidence in the man who did it. The plate is 7/8 T1, but the only brace is a piece of 5/8 x 4 running straight forward to the crossmember. It has moved some huge overloads in the last 17 years, and totalled a 25 to pintle hitch, but the plate hasn't given at all.
The one on my tandem truck is, I think, 1/2" plate, welded to the frame. It was on the truck when it came from a large, state-owned utility.