Not the OP, but I think they mean the first time they flew internationally, it was in a 747?
“Only negative is that it is all so over the top - wife and I more comfortable in biz or e+”
Odd thing is I thought the 747 was usually configured with biz class upstairs (I got a biz upgrade on a SIN->DPS flight many years ago and flew upstairs) and first class in the front of the main level, so maybe they weren't talking about first class. Or perhaps some airlines have/had 747s with first upstairs.