Thank you, Sebo Fan, for your advice. Now I'll say more things about the vacuum.
Here's the canister with the open lid, the bag with a part attached to it and the bags' container bag. I had a hard time finding more bags that are compatible with the machine, but eventually, my father went to the Chapman Boutique store to order the bags. Some days later, I got them and they fit.
I'll be posting a link to the website about the store, but it's in French only.
[URL unfurl="true"]http://www.boutiquechapman.com/[/URL]
[ATTACH=full]86338[/ATTACH]
[ATTACH=full]86339[/ATTACH]
[ATTACH=full]86340[/ATTACH]