A genuine Cox's Orange Pippin
 

Having spent part of my childhood in Kent, i know a genuine Cox's Orange
Pippin apple when i bite into one.
A while ago we bought a so called Cox's apple tree. While it had a hint
of the Cox's flavour, it was definitely *not* the real thing.
Is there any way when we buy another tree that we can ensure that it is
the real Cox's we are buying? Thanks.