Hey
Crazy Vick,
Harry Caul is correct. That is (supposed to be) a French 2 Sheet. I don't know French sizes all that well--so that wasn't the real tip off for me. BUT...I know of French Petites and Thierry hates "French Grande"s. If they were trying to make a big impression with a 2 sheet, why bother with the petites? Thierry hates "French Grande"s would make more sense...and it is way too small for that. But again, I am not super familiar with French sizes.
The three-sheet I did recognize as being too small was for CREATURE FROM THE BLACK LAGOON (shown here next to a one sheet for THE CREATURE WALKS AMONG US):
Jeff, all I can imagine from the Youtube videos and websites you saw about this is that none of the people who posted about it are poster enthusiasts and they didn't realize they were seeing fakes. My friend didn't...and I (taking it at face value) probably wouldn't have either had my friend not made his comment about them being so perfect for their age...causing me to look closer...and then seeing the alleged three sheet.
Also of note to you was in the booklet, they show part of a one sheet from "PHANTOM OF THE OPERA"...but there was NOT one there on display.