I recently came across an online auction for an old Richardson root beer fountain dispenser. These were in the shape of a barrel, made of wood, but actually contained a tank to hold syrup, maybe something to hold ice, and a connection to the carbonated water supply. They used to be in some five and dime store snack bars as well as in roadside restaurants. They had a distinct way of marking the barrel; the spelling was RICHardson. Turns out the syrup is still being made in Macedon, NY by Baldwin Richardson Foods. They make Mrs. Richardson's ice cream toppings and Nance's mustards, but most of their business seems to be wholesale foodservice and manufacturing.
I have seen various flavors of Richardson's syrups in foodservice distributor cash-and-carrys, but didn't connect them to the root beer of old. I'd like to find a restaurant that uses Richardson's Root Beer syrup and see how it compares to back in the day. AFAIK, they never bottled the root beer in my lifetime.