This skillet sits totally flat on our glass top stove. It's one of the first cross slant logo to be made that's why it has ghosts marks of the last edition Erie skillet. This skillet is very lightweight with thin sidewalls as pictured. The cooking surface is smooth even with the normal utensils marks and a couple of flaws known as flea bites. I stripped the skillet with lye to bare cast then seasoned it 5xs with Easy Beezy cast iron seasoning.  No cracks or chips. Free Griswold advertising shooter marble with store name and stand.The last pic is the last edition Erie that the ghost marks are from. This highly collector and everyday user won't last long. a true family heirloom piece. please check out our other Griswold cast iron on our page. Thank you for looking.