The eBay folio is definitely a later model, as it has a phone number with an area code written inside. That dates it to 1947 or later. I also think her document folio was larger than the eBay example, which I posted just to illustrate that Talons were used on that sort of bag in that era. It wasn’t a typical chart bag as carried by airline pilots, but maybe held the charts she needed for any particular leg. .
Larger luggage such as a suitcase or a B4 bag would require a larger zipper and slide. The artifact was likely from a trouser, flight suit, or small bag.