Finding one with a natural sound hole can be tough to do. The problem is not in having an open knot hole but getting one that is the appropriate size for the instrument. Stability of the hole can be a concern too as knot holes tend to want to crack around the edge. If you do go that route make sure that the builder has reinforced the edges of the hole in some way.
Buying a hourdrop
This is my Warren May 'Hourdrop' in black walnut. I love it! It has a rich, mellow sound (cherry would be brighter).
Thanks Bobby and John. I'll check those out.
Ron Ewing makes an awesome one (various sizes too). 
David Lynch and Warren May make nice ones.
I recently saw an hourdrop dulcimer on this site and fell in love with it. I would like to buy one but I don't know what features I should be looking for. Tips on what woods sound the best, builders, etc. I've also seen dulcimer's that have natural sound holes. I really like that look. Does anyone recommend that? I'm really new to this so any help would be appreciated. Thanks.
updated by @karen-pounds: 03/03/19 05:29:34AM
updated by @karen-pounds: 03/03/19 05:29:34AM
