Are there commemorative plates for all 21 missions?
The California Pioneers of Santa Clara County has inherited commemorative plates of 8 of the California Missions. We would like to have a complete set if there was one. Can you tell me if 21 existed and could we possibly acquire the other 13.
You need to contact an expert on historic collectables. You will need to have photographs of at least a couple of the existing plates (front and back) to send.
There was a Los Angeles company, Vernon Kilns, which producted collectable pottery and did have California Mission plates. You might check the back of the plates to see what information is there.
In order to fill out the collection (presumeably there are at least 21 plates in the set) you will have to work with an antique dealer or go onto ebay. It doesn't look to be terribly expensive.