This article has also says 10, but only lists 9.
the-journal.com/articles/174520Rediscovered apple varieties
Gold Ridge, found near Pomeroy, Washington
Sary Sinap, found in Latah County, Idaho
Colman, found in Latah County, Idaho
Claribel, found in Latah County, Idaho
Butter Sweet of Pennsylvania, found in Latah County, Idaho
Streaked Pippin, found near Waitsburg, Washington
Milalfyi, found near Pullman, Washington
Nelson Sweet, found near Seattle
Fink, found near Boise, Idaho
Rediscovered previously
Nero, found in Whitman County, Washington (2014)
Arkansas Beauty, found in Whitman County, Washington (2016)
Dickinson, found in Whitman County, Washington (2016)
Shackleford, found near Spokane, Washington (2017)
McAfee, found near Whitman County, Washington (2017)
Saxon Priest, found near Ellensburg, Washington (2017)
Kittageskee, found near Boise, Idaho (2017)
Ewalt, found near Rathdrum, Idaho (2017)
Flushing Spitzenburg, found near Rathdrum, Idaho (2017)
Surprise #1, found near Dayton, Washington (2017)
Regmalard, found near Troy, Idaho (2018)
Excelsior, found near Moscow, Idaho (2018)
Jackson Winter Sweet, found near Waitsburg, Washington (2018)