Pair of Napoleon III brackets from a bar - 45"

This pair of cast iron brackets date from the nineteenth century. Originally screwed into a countertop with glass shelves for displaying glasses and alcohol in a bar. they are adjustable. 

Condition and patina consistent with age.
Approx. overall 45" high x 13½" x 2¼"
Approx. overall 114cm high x 34cm x 6cm