What candy bar has been around the longest?!
Answers: there have been some flash in the pans, what is the ironhorse candy bar?
There is no clear idea apart from the fact that places chocolate bars as first originating in the 19th century with the Granog Brothers in Canada the most likey first individually packaged bar in North America in around 1910. Evidence suggest Cadbury's (Britsh) or possible Nestle could claim that distinction. Several European companies claim that distinction. The Mars company may also have a case. Lindt and Ghiradelli have bar chocolate varieties that have been constantly produced since around the 1850's. Whether they were individually wrapped all depends. Lindt bars were individually wrapped in some markets in the 1880's, and varieties that have been in constant production for at least 100 years.
Several chocolate bars varieties have changed manufacturers, making this question rather difficult.. I do not believe that Hershey's has the pre-eminent distinction though, nor any of the largest manufacturers except Mars..
British English and Canadian English and International English does not include chocolate as 'candy'.
Try doing some research: I think you might find the answer does not lie in the US, much less Hershey's. Hershey's own site admits that it started making chocolate for coating confectionery in 1894.
Hersheys Chocolate Bar
Hersheys Chocolate Bar