What is the size across the plate and is it marked on the backside?
Thank you for the image and dimension.
Your vintage Made in Japan plate with a transferprinted scene of The Last Supper was made as a decorative wall art export ware for Mid-State Products Co. Lynchburg, VA. The gold on it is real, however there is no longer a precious metal melt down value as the cost to extract the gold will exceed the value of the amount extracted. This can carry a high auction estimate of $10 - $20.
Here is a link for you to a comparable example that was offered at auction at that price estimate:
Here is a link for you to one that sold for $20:
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