Thanks for posting. If there is any chance the missing piece of the main label is still in the basement, find it! It is a nice find nonetheless but the value hurts for lack of the full label. On the plus side, your bottle is embossed to match the label of the pre-Prohibition ("prepro") whiskey bottle.
I also like that the label is marked with the Pure Food and Drug Act suggesting the contents are for medicinal purposes only :-)
Here is a link to all the historical research on this company:
https://www.pre-pro.com/midacore/view_vendor.php?vid=PHL1132
So we know the bottle is definitely pre-1918
value $20-30 is a rough estimate