Those are not the part numbers for the key-set - those are the applicable ranges for the two different types
The first set is for classic models up to VIN 343680 - that uses a different type of connector
The second type is for models from 343681 and includes the last of the classics and all roadsters
You need the second one
Keys?
Who needs Keys
(hint - see signature)
If you do end up buying replacement ignition, you can easily adapt to your original key:
the key-switch is in two main parts - the electrical switch and the key-lock;
they are joined together by two tamper-proof screws (not to be confused with - although similar to - the tamper-proof screws securing the switch to the triple clamp)
You can separate the two parts and mix & match using your old key-lock on the new switch - negating the requirement for separate keys for ignition vs tank.