Kudo's to all on this great thread and extra thanks to Scrumpy for his write up and great pics!
As a hobbyist Orchardist and beer brewer, (this cider making will probably kick into gear next year.) - I would like to point out some peculiarities with apples.
A seedling is a tree grown from a seed. Simple enough, but any known variety of apple has been grafted onto a seedling or a cultured commercial rootstock like M7 or B118 (if you want to google these). So, if you ask the question, what kind of apple is this? (and Scrumpy touched on this), I would ask you back..is this a grafted tree? In most cases, "line-er" trees like ornamental crabs (or wild trees) are grown from seed. Ornamentals grow true enough to seed that corporations like Walmart can order them just to plant in a line for decoration and be reasonably assured that the trees will be mostly uniform in size and produce the same product. These are nursery grown and are predictable.
I've got some fallow property that I decided to enhance for wildlife - (turkeys, deer, pheasant, quail, song birds, even mammals - squirrels and whatnot) with ornamental crabs that are know for reliable heavy crop loads. Out of a twenty pack, 4 of these trees that are wild-offshoots. 1 produces an apple the same size and shape as a red delicious but it does not turn red. Another is a nice large-ish sized apple that is very delicious and will be squeezed eventually for juice and cider just because its of a "desert-sweet" style, I'm sure high in sugar. The other two vary somewhat in size of fruit and color much like what Scrumpy has shown.
Oh My! - I can not wait to start with combining varieties to create the best hard cider I can...Honeycrisp with Liberty and Wickson crab for example..Straight Kingston Black cider maybe...Golden Delicious and wild crab...the combinations and permutations are endless but super enthralling to me anyway. I should have plenty of my own apples to deal with in 2018. 50 trees and 30 varieties will eventually be way too much, what a great position to be in I think.
I've read a ton of books and websites and made juice and cider with others. I am really looking forward to doing it my way - which will be mostly like Claude Jolicouer's way I'm guessing..keeving has me glued as I am somewhat a fan of sweet, not totally dry ciders..although not super picky.
Color me a fan of homegrown apples, cider and this thread.