Hi Jimmy, Happy New Year!
I re-measured my dulcimer and it's not 39" but about 381/4" or so. It's standard, not a bass or baritone and it's got a fantastic voice. The open string length is 27" Made by David McKinney of Modern Mountain Dulcimers. In the second picture you can see the "second bottom: which adds to the depth of the dulcimer and also enhances the sound. This actually is the nicest dulcimer I have ever played.