So, in the after-Lift Home scene in 1941 - they seem to be drinking the Châteauneuf-du-Pape. Probably the 1921 year they drink in S1.
So when Aziraphale says: I have several very nice bottles of Châteauneuf-du-Pape in the back. I picked up a dozen cases in 1921, and there's still some left for special occasions.
The undertone might be like: Oh remember the last special ocassion when you saved my books and we had candlelit date dinner together?















