I look for the black marks to be further apart with three belly scales between them, not just one. But if it's reported to be a 100% don't go by the markers go buy trusting the seller or not. I think the markers are mainly usefull for picking through possible hets and even then not a sure thing. Maybe this is a het without the typical markers or maybe it's a normal with something the seller thought could pass as the markers. It does seem to have unusual black striping on the belly just a little more close together than I see in my markered possible hets.