When visiting ligne 4, I use the timetable and train numbers to determine which trains are hauled by CC72000 engines. That has proven to be an accurate method, but doesn’t work all the time. The next 2 pictures are proof of this. I was expecting quite a different train… but the surroundings still make for a nice photo. Here we see a train to Paris, passing the old station of Marnay-sur-Seine.