Jeff, I would suggest you contact Elderly Instruments for an appraisal. You will get a fair idea from these folks as to their worth. I spoke with their vintage appraiser, and he suggested you send him a picture with a camera phone or camera and he will give you an idea as to worth. Of course, a full appraisal would require them to see the instrument up close, but he will give you an idea. His email is frog at elderly dot com.

All the best,

Mick