Many of the Mk 1 parts are used on later aircraft up to and including the very last model
And as a starter the part number must have the "dash" number eg part 35608 is the wing on a Mk 24 but it contains thousands of parts - many of which are from Mk 1 and a small number of new parts like the 35608 681 and 35608 682 which are two of the leading edge skins.
Some parts like fuselage intercostals have probably 20-30 part numbers covering over 100 parts so intercostal 30027 1275 may fit in more than one location.
There are other (inspection) stamps to look for too which tell which factory made the part. NOT ALL FACTORY CODES ARE KNOWN.