Metal Dunlop shelf sign depicting the founder of Dunlop Pneumatic Tyre Company, John Boyd Dunlop
A rare item, circa 1920.
(Note the 'Motor Cycles' is sold).
 
Dunlop is a brand of tyre originally produced by the Dunlop Pneumatic Tyre Company from the end of the 19th century, taking its name from John Boyd Dunlop. The brand is used for many other products made from rubber or with rubber components and some with a looser connection to rubber.
 
source: https://en.wikipedia.org/wiki/Dunlop_(brands) (edited & citations removed).