When I was a little girl, I was the small, wiry, tomboy child, so my job each year was to climb up on top of the refrigerator and unload the Pesach cabinet, by carefully handing things down one at a time. I felt very important because my being small was for once an ASSET. Every year things came down in a familiar order until this plate. We never used it come to think of it, but that plate was always in the far recesses of the cabinet and when it came down, that meant I was done.
I never gave much thought to the plate as a child, but recently, when my mother moved to Eretz Yisroel, sentimentality dictated that I take it to my house and I then had the opportunity to examine it more closely.
We always got a chuckle that the plate was surely painted by a gentile because of the obvious mistake on it, but I never took note of what the plate was for.
My grandfather's name is handpainted on the back and it appears that it was presented to him in 1926 on the 40th anniversary of the choir of the Klaus shul in Germany.
Pretty amazing stuff.... now if I could only find a use for it......