Jon:I was selling cuttings from My older Celeste selections,that I was pleased with them in the past,as being with larger fruits or not dropping as bad as other regular Celeste I grew and discarded.
I do not remember to have been sold Improved CEleste cuttings because the tree is small,and if I did sel one kit or 2 I specified it as :Improved Celeste(not O rourke).
If it was not specified then it was not from this Improved Celeste.
This Celeste is as good tasting as Regular Celeste,But in Bad adverse rainy condition,it does lose flavor,while Non improved Celeste does not.
So you see one grower has to have non improved Celeste (Original),too,so it decide for himself what he likes better.