Coon Hollow was a brand produced before Prohibition by at least 3 distilleries in Nelson County, RD# 379, RD# 294, and RD# 10. At least one of them was Cummins. The brand also was resurrected for awhile after Repeal; here is a photo of a post-Repeal version by National Distillers.
I agree that Pre-Pro.com is your best source for information about this. Try this link: http://www.pre-pro.com/midacore/snyder.php
and enter "Coon Hollow" in the search box. In fact, they'd probably appreciate you uploading that photo to add to their database.