Thanks everyone  it is indeed a John Rawdon number 52.  Your information really helped.

Here is a link to info on Dulcimers by JR. Once you reach the site, scroll down to June 7.

https://heritagedulcimers.wordpress.com/today-in-mountain-dulcimer-history/timdh-june/

Ken

"The dulcimer sings a sweet song."

It might be from Dulcimers By JR, 10068 Stonecreek Rd., Newcomerstown, OH 43832

I got this dulcimer aboit 1982.  It is  a wonderful instrument but I don't know the maker.  Inside is a stamp which has "Appalachian and Hammer Dulcimers by JR ( or SR)."  It lists a phone number with a Northern Ohio area code. The number is no longer available.  I would like to know the builder.