Tip Toeing around Crown Lynn Tulips ....

I hadn't heard of the term tulip until mrnarna used it on here one time and I asked him about it. He told me that it was a common term on Trademe for the often seen tapering cup shape. This shaped cup is the 781 shape.
Now on a recent trip to the Museum, where I was just researching shapes info, I noticed that the cup shape 752 was called a Tulip in the Crown Lynn records
...... ohhhhHHHH?
I don't know the 752 cup shape ..... yet!
Perhaps it's the so called 'fatbum' as I don't know the shape number for it either ....?
Any help would be appreciated as I don't want to upset any collectors out there.

Good grief we already have the 752 shape in the Shapes Gallery!!!!!
This is what Crown Lynn called a Tulip -