"XX2247" is a "CODE NUMBER".
Notice that it is SIX digits, two of which
are 'X's. (which is NOT normally a cut number). The digits of
"XX2247"
are presumably COMPLETELY arbitrary, and serve to identify a given code,
NOT give you the depths.
Old Fred, I can always be wrong, but the XX2247 is the depth of cut for
the 6 slots of the key. X means no cut and 2247 are the depths for the 4
cuts on the key. Someone with an original key can confirm if there is a
sequence of two non-cuts, two equal cuts and two different cuts on the key?
Thanks
Alexandre