No problem, I do believe you!
Well then, sorry of having been rude, I stand corrected. But I have to add that I have never ever seen such an animal as a 12 bottle champagne case, neither in commerce here in Europe nor at the houses I have been to (which include the above save Chas. Heidsieck & Deutz; add Billecart-Salmon, de Castellane, and Joseph Perrier as Grandes Marques).
It's Ruinart, not Dom Ruinart, the latter being Ruinart's prestige cuvée.
M.