This is what we believe to be a William IV/early Victorian, rib-moulded glass spirit bottle dating from the beginning of the 19th century, c1835.   
 
The bottle is in excellent condition for its age.  This means, of course, that it shows the age related wear and tear to the base commensurate with nearly 200 years of use.  It has a polished out pontil mark to the base.
 
The bottle is in the amber colourway and shows broad rib-moulding from the base to the pouring rim.  The base measures 8.3 cm (3.3 inches) in diameter.  The bottle is 30.5 cm (12.2 inches) in height.  There are no chips, cracks, significant scratches or any evidence of restoration. 

Quote stock number: 4246