A few years ago I scored pieces of McCoy Pottery's "Canyonware" and was able to assemble basic service for ten after two very separate trips to two different thrift stores.
Yesterday I found one dinner plate at Goodwill, so I picked it up for a spare. When I got it home, I discovered it's different from the others. As you can see in the picture below, the bottom of the "new" plate has two concentric rings that are not glazed.
I examined my other pieces and found that bottoms of soup bowls, saucers, mugs, and serving pieces all have unglazed rings, but dinner and bread plates don't.
Could some pieces be older than others? Which ones? I think my dinner plates could all be "seconds" but that doesn't matter to me. I'm just curious about the difference, and any story behind it.


Yesterday I found one dinner plate at Goodwill, so I picked it up for a spare. When I got it home, I discovered it's different from the others. As you can see in the picture below, the bottom of the "new" plate has two concentric rings that are not glazed.
I examined my other pieces and found that bottoms of soup bowls, saucers, mugs, and serving pieces all have unglazed rings, but dinner and bread plates don't.
Could some pieces be older than others? Which ones? I think my dinner plates could all be "seconds" but that doesn't matter to me. I'm just curious about the difference, and any story behind it.

