Thank you for your responses Everyone. I found an auction on
ebay for an OG hinged Scott #650. The top of the hinge is still attached.
The stamp is from the time frame I referred to, and the hinge remnant looks like the hinge type I am inquiring about.
So this is likely that the hinge is not removable unless soaked in water?
The reason I asked about this hinge type is my Wife and I want to continue to collect in this old album as the original owner had. The collection is used US stamps. We acquried the album from a dealer.
One reason to collect used stamps with hinges is mounts for mint stamps would make the pages bulge too much. The album is hard bound.
The original owner wrote her name and date on the opening page. Certainly, this modest collection meant something to her. I'm assuming she didn't sell the collection, but perhaps she did.
As odd as this may sound, my Wife and I want to continue to collect in this album in her memory. Certainly, we can do so with hinges sold today.
Thanks again for Everyones replies.