Hello again guys,
Thanks for the helpful info to all of you.
Yesterday I also found this page,
https://watchguy.co.uk/cgi-bin/library?action=show_photos&wat_id=2154
with some helpful photos to keep on the trajectory of the watch.
Also thank you to @Graziano and @steve855 to post the link and also the info on the page.
Attach I am uploading the actual situation of the watch and on what condition I the watch was giving to me. The previous owner friend of my grandfather gave it to me since he take it all apart and never was able to mount it again back.