This appears to be a Lugenes wall plaque from the mid-late 60's. The Cave train was opened on May 11, 1958 so we know it is after that date, and in 1968 They first charged admission to the park. I say this last part because Many items before 1968 say Silver Dollar City in Marvel Cave Park but most of the cave items simply say Marvel Cave. I have a plate similar to this by Lugenes and with a search on Google you can find many ceramic, and resin plates and hangings referring to Missouri, Ozarks, and SDC/Marvel Cave (along with many other things not Ozarkian!). Just my opinion though.