The top plastic curly binder thingy was a thing for several T/M/S, including the T-34. It was a pain in the ass to use, and made even worse when there were interim changes. Thankfully there was enough push from users and they went away. Otherwise I've only seen side rings, which thankfully were eventually changed from rings that randomly released to the insulated locking wire rings used now.
These guys...

Were in cahoots with these guys...

aka Paper A$$holes
6x9" clear covers and first page, followed by 4.5x8" standard procedures section, followed by a 6x9" divider, followed by 4 dividers 6x9" with 3/4" tabs across the top sandwiching 6x9" side tabbed Emergency Procedure Flight Reference Cards.
Granted, this is an interim fix until the standard procedures section is also enlarged to match the rest. Then eventually, my MTF checklist will also be enlarged. But, I have to admit, it would make the conversion to a Cocktail Checklist a little more interesting.
