AlessandroB wrote on 2024-03-31, 02:35:

You who are more capable in research, could you tell me where to find the image of the original IBM disk so as to restore it to the factory settings? Possibly ITA version Thanks

Check https://forum.thinkpads.com/viewtopic.php?t=128170

If you are in dire need:

https://archive.org/details/ibm-restore-t22-frf

but is in french.