The Botanist called this the Siberian apple, and said it was planted to be a pollinator. Even the deer won’t eat the fruit, he said. Indeed, even in the spring I have found apples below it on the ground when there are (nearly) none in the rest of the orchard.
It has an odd shape, and this is without pruning for in excess of six decades, perhaps longer.
I just Goo-d Siberian apple, and did not find this (crabapple, yes). Must be something missing from my info, or possibly my impatience with my hinterland internet connection (and thus reluctance to keep scrolling down…and waiting waiting waiting).