I'm so glad I came across this information. About a month ago an old friend stopped by for a visit and gave me a dulcimer that her neighbor was just giving away. I love stringed instruments and she thought I might like it. I noticed that there was a typed label inside that said that the dulcimer was made by John Maxwell #2138/ Cumberland Craft Center, Tennessee. I'm assuming it is by your dad. He sounds like he had a really interesting life. Glad to have a little piece of Appalachian history.