Please help identify apple variety
My friend has a wonderful apple tree that has been in her Saratoga, California (climate similar to San Jose?) yard for at least 30 years. She doesn't know its name; her father planted it when she was a child. The fruit is very crisp, usually green and red striped, and a good size (3"+ diameter) The fruit is now yellow and red maybe because it's later in the season or maybe because they've been on the tree a long time. The tree is 10' tall. I have photos of the tree and the leaves, but can't figure out how to post more than 1 photo. If I knew its name, I could try to find one at a nursery. Thanks!