Every pawnbroker, secondhand dealer, junk dealer or junk collector shall maintain on the premises where said business is located a sign plainly printed in the English language of sufficient size so that the same may be easily read from the sidewalk in front of said place of business, stating that he is a pawnbroker, or secondhand dealer, or junk dealer, or junk collector. Where said business is conducted in a department of any building, the sign shall be placed at the entrance of said department. (Ord. 2065 § 2 (part), 1975).