I tried my best to save a picture of my dear mother that was duplicated on a plate. The plate was broken and then glued back together, except for the missing piece in the upper right hand corner. On top of this, beside being off color and contrasty, the picture was very grainy, the sort of picture I would just delete in normal circumstances. After all, it suffered through being duplicated on a plate, and then had scratches and cracks to repair!
The condition it was in was actually well beyond my capabilities to restore. But I made a gallant effort anyway, since it is the only copy of a picture that is special to my sister and me. I know the result would not be acceptable to most photographers, but to us it priceless! It is the wonderful mother that it brings back to our memories, and that makes it valuable. Mom died in 1970 at the age of 68, and we still miss her!