Whatever the pollen parent, it is very unlikely that a tree grown from seed will be close to the fruit from which it came.

Anyway, what will affect the taste is the tree that donated the pollen to that 30' tree from which the apple came.

If you want apples like the one from that tree, collect some scion wood cuttings this winter and graft it, in the spring, to a rootstock or to an existing apple tree that you have.

runswithscissors, below is a link to a thread that might help you understand something of fruit tree reproduction. There's some confusion in the thread but it should come clear if you read through. The short version is that modern apple cultivars are no more "hybrids" than apples from 200 years ago -- neither are meaningfully "hybrid." Tree reproduction is very different from garden crop/vegetable reproduction, so a lot of people seem to get confused assuming they're more similar than they are. Growing apples from seed generally isn't ever (and hasn't ever been) the way to reproduce any unique apple. Apples are pretty easy to graft, which as murky suggested, is the normal way to reproduce apples (and has been for centuries -- the Bible even talks about grafting grapes in Romans by way of analogy.) If you want another tree like the old one, just ask for whatever guidance and help you need on this forum, and I'm sure you'll get it.

Here is a link that might be useful: Fruit trees from seed

Listen to the experts. (past tense
drip under preasure) There was an orchard on this property in 1830 owned by Steve Salsbury. I found a wild apple growing in the back 40 and grafted it closer to the house. it is my best cider apple . Take a chance it may be the next granny smith.

I just wanted to clarify, when I said ask for whatever guidance and help you need, I meant help getting a graft of the good tree growing at your place or wherever you'd like to have it.

Thanks all, I appreciate your input. And thank you cousin, for the link to the other thread. I did learn new stuff about the apple growing process.

The seeds will vary, and usually be inferior.
Better to graft the seedling wood/cutting onto a full dwarf root if you are in a hurry to see what the fruit is like, or you will have to wait 8-9 years. Dwarfs fruit much sooner 2-3 years.
Most of the fruit will be of lower quality.
Some can actually be as good or better.
The odds are against you though.