Usually they will say PEWTER not PEWTERWARE. I got a closeup of the hanger and it doesn't look like anything I've ever found that's pewter on this site:
https://www.ebth.com/items/7248421-w...wter-tableware
Expand the pic and go to 7/23. That hanger is cast with the plate and from the angle of the picture you can see the drilled hole looks like aluminum.
I've seen a bunch of pewter but I ain't seen it all. That one on the lower right has a hanger on it that's held in place with a screw. That's usually a good indicator that it's something other then what we use.