Earlier quoted context omitted.
Uhm, what about Guinness? The guinness brewery has been around a lot longer than 1950. Also, are you claiming there was no such thing as an Irish pub before 1980? Again, uhm, no.
I draw your attention to the word "almost" in my comment, and its neighbour "entirely", which it modifies. The brewery may date to the 1850s. As a widely-known name, popularity trailed the records book published by the same concern, largely beginning in the 1960s: https://books.google.com/ngrams/graph?content=Guiness+%2A&ye...
The popularity of the Book of Records probably doesn't have much relation to sales or awareness of the Guinness drinks. Guinness Extra considerably predates the 1850s: Guinness has been a big manufacturing operation and a big brand for a long time. (However Guinness Draught, being a keg beer, is naturally from the 1950s, though it's the successor of Guinness' cask beer.) Several other European beer brands have histories going back to at least the late C19: Heineken, Carlsberg, Paulaner, ... Several of the famous Italian amaros like Fernet-Branca and Campari are solidly second half of C19; so is Angostura. Chartreuse is considerably older. Several Scottish whisky distilleries have quite long histories of continuous production, though of course the current international fame of Scottish single malts is relatively recent. Bacardi was distributed outside Cuba since at least the 1930s.