These knobs are definitely not authentic. They're very cheaply made, dirty, not well cut, have sharp edges, don't even properly replicate the original knobs, and above all, don't fit the oven they're meant to fit onto. Mine is a Lamona LAM3204 and they're slightly too small to fit onto the pins. I'm sure you can tell the difference between the originals and these from my photos (cheap left two, originals right two).