BA's 747-200's had Y upstairs - IB still fly 742's and they have First upstairs.
Eva Air have both F and J on the upper deck of their 747-400's. NW used to F upstairs on their 742's?

If you like the upper deck of the 747-400, then you would LOVE the 742. It's very, very spacious and quiet with a nice little standing around area forward to the spiral stair.