It is not a TAD case or a Gina case. It is more likely something made in the 70s early 80s. The liner used first came into being with Fellini cases. Prior to that as far as I know the liners were simply thin nylon. Bob is the one who started using the heavy felt.
Some have stated that it is an early it's George. That's possible and correlates to these pictures I have in my collection. The only thing that doesn't fit is the lack of a white border for the dividers and a logo.
So it's quite possible in my opinion that you might have an It's George made before It's George was a brand. Or the logo has worn off completely.
I got my first Gus in 82 the case looked just like that in plain smooth black leather I was told. It was a George but it had no markings when Gus could no longer get Fellini I think they made them for him but I don't have any paper work to back this up