[passionfruit]

I would love to see pictures! My husband and I own an old ranch in the California mountains. We have an orchard of heirloom apples. Planted 100 years ago, we still haven't identified all of the varieties of apples we grow yet.

[Rudder]

...its appearance doesn't match up with any other variety...

A picture is worth a thousand words.

[panaxanax]

I have a 2 volume set entitled "The Apples of New York" (published in 1905 by the State of New York-Dept. of Agriculture) that I use regularly to identify wild apple trees here in NY. Since most of the apple trees in the U.S. came over with the immigrants as sprouts/cuttings and then moved west with the settlers, these books may help you identify your heirloom apple trees. They're not cheap books, I paid $150 for the set and have seen copies go for as high as $350.00. They are full of cross section lithographs and give the history of origin for 100's of apples types. Try ABE (American Book Exchange). Good luck.