Hmm, that's an interesting one. Tried helpmefind.com/roses for HT's with a yellow reverse (it is yellow, right?) and Gypsy Carnival and Imagination look similar. If you were to search yourself and look through the photographs you might be able to spot it. There are lots of pictures.

It looks a lot like Gypsy Carnival. Does its yellow reverse fade to a white reverse as it ages? Gypsy Carnival is a/k/a Lipstick.