I have a "Thin Man", Old Mr Boston Brand- Rocking Chair Whiskey bottle. It is in a test tube looking bottle. I cannot find a date on the bottle anywhere. But the bottle has never been opened. The seal is still intact. It belonged to my grandfather, and looks pretty old, but I'm not sure. Does anyone know how old this bottle may be, or if it is worth anything? Thank you so much! I am enclosing a picture for reference.