70s/80s I Bogen Photo Corp I Top Load 2"x2" Vinyl Slide File Pages

A full box of 100 2"x2" see-through slide file pages by Bogen, for 2- or 3-ring binders. Item #2255. Each page holds 20 slides, with 3 punch holes on the left. Note: The image on the box shows 5 holes, however, as you can see there are just 3 holes on the actual page. The box is cardboard and has a semi-circle opening on the top, shown in photo 8. Not sure why as the pages are very stiff and cannot be pulled through the top. I manually counted each sheet, and all 100 are accounted for. *Pricing for same as this box is heavy/over 5 lbs., so I will have to bear the extra shipping. *Please be aware that these are made of vinyl. As one photography site states, "Plastic enclosures manufactured from polyvinyl chloride (PVC) are not recommended for archival photographic storage. This plastic, often referred to as "vinyl", is not as stable as some other plastics. It can contain volatile plasticizers acid as it deteriorates." Photo 1, main image Photos 2-8, all box info/images Photos 9-13, page images, all stamped Bogen, all punch holes un-punched, each page measures approx. 10.75"(L) x 9"(W) Photos 14, add'l. image Photos 15-16, example of an ad with the same logo, which I think is helpful in dating this item - the logo font definitely appears very 80s. The last photo is the *nearest* reference I could find to this exact item, but without the ability to view the full-text, it may or may not be. The date is 1975, so this item dates somewhere around these dates I think.