Mystery solved! Jung’s also sells the yellow Stuttgarter onion sets:
https://www.jungseed.com/product/J04590/606
Syracuse professor grows 40 different fruits on one tree. Five minute video:
https://www.youtube.com/watch?v=5kO6-PpgZ1M
I think I ordered some from Gurney’s...Not sure, I’ve ordered several packs of onion seeds hoping I would get the right ones.......LOL!