gr8signfinds,
I saw where you sold & bought your T-53 on ebay while I was researching your question.
Notice all the T-53's look the same? Notice the shanno seller you mentioned has sold a few of these?
Notice there is never verification/guaruntee of originality in these descriptions and not just this seller?
Porcelain signs are being made to this day, look at authorized reproductions. Looks like you have several original porcelain signs-any of them look like the front or the back of your T-53 you had? Notice all of them for sale are in exceptional shape, WITHOUT fail?
Until one comes along with a traceable history, I would stay way clear of these flat versions.