I was working in the basement today and found an old stash of photo paper, as well as some film.
I have a couple of 25 sheet packs of 8x10 Portriga Rapid in grade 3. It still had a couple of price labels, and I think the price labels had a date from 1978. The regular price was $9.95, and the sale price was $8.45. These would be in Canadian dollars.
I also had a large package of Kodak Ektamatic SC paper that was 16x20. I'd forgotten all about this, but it jogged my memory when I saw it. This was a B&W stabilization paper, meaning it would be developed in a special stabilization processor, which was only two baths, and provided very quick prints. It's something a newspaper might have used to get quick proofs. It might also have been used by wedding photographers for proofs. The images were just stabilized, so they would fade quickly. I used to use this paper in regular B&W paper chemistry with regular fixing. It was nice, since it produced very nice deep blacks. It was also relatively inexpensive, if I remember correctly. The only disadvantage was that it was on a fairly thin base paper.
The last one was Kodak Kodabrome II RC. It was a 25 sheet pack of 8x10, and still had a price tag from Woolco for $16.10. I don't know the date, however, so I'm just guessing at sometime in the 80s. I don't think anyone would miss this paper.
I also found a box of Kodak Pan Masking Film in 8x10 from the early 80s, and a box of Kodak Royal Pan film in 5x7 from 1978.