Chimay Rouge - or alternatively Chimay Red Cap - or even La Capsule Rouge - the Red Bottle. Like Chimay Bleue, the Rouge that we enjoy today was also introduced back in 1948, however this Trappist ale has a longer historic connection as it most closely resembles the pre-1948 biere forte that was brewed at the Abbey de Scourmont before the war. The recipe for La Rouge dates way back to the first days of brewing at the Abbey.
Of course, "Premiere" means the "First." Back after the war, Chimay Rouge was only offered in the 33cl bottle. Then, in 1978, it was also offered in the larger 75cl bottle, the label of which carried this notation "Premiere," a nod to those pre-war days. In either bottle, the ale is the same. That said, some folks espouse the fact that since there are differing amounts of beer in the different size bottles, then the beer will age differently. Yes, perhaps.