Kubricks exhibit - looking for some information about props

I recently visited exhibition in Krakow/Poland about Stanley Kubricks life and work, it was earlier available at LACMA. It was a great experience. I'm watching my photos from this exhibition and I'm struggling to find information about some binder/office supplies which was used to present original screenplays and notes. One of the screenplays was mounted in SEAB binder ("made in sweden"), named "göteborg 5". Google and ebay search didn't help.

Looks like a standard binder that is in almost every office here in Sweden. Check this link: http://www.tonerlagret.se/jopa_parmar_med_trarygg
My guess is the "SEAB" marking is a company that has made a custom binder for some reason.