Not sure, but I'm glad they stopped. My friend showed me a similar looking one full of Indians and a Flying Eagle. All were covered in green patina.
I had one of them as a kid. About early 1960's. [yup, I'm old.] I forget who made them, but they are common.
At the coin club, we've seen these poster boards with dates in the 1950's. On the back of one of them was advice on how to clean your coins!
Yes, I have several Littleton folders, they're pretty nice until you decide to remove a coin and your finger goes thru the folder. They're not very strong, but are nice looking...
All folders are really not a great idea for coins. And I just went to the Littleton web site and yes, their albums are GREENNNNNNNNNNNNNNNNnnnnnnnnnnn