I have not read the VRF thread, but, from the text of the letter, I smell something very fishy here.
The letter seems to have been written by a non-English-speaking individual (I would guess Asian). Based on the letter's grammatical form, it is pretty clear that the author's native language is NOT English ('Send to you as a reminder that', 'I hope you'll like it makes a special decoration' & 'Don't forget to take the letter Sales Department'), which would make little sense coming from a 'John Ogilvie', Pan Am's U.S. General Manager, who, at the time, would have been based in Chicago.
So I do not think it takes Sherlock Holmes to deduce that if the letter is fake..............
Now, on the other hand, my Pan Am incidentals are 100% genuine, so.............