I realize this is weird...but I found a box of film, that in my brilliant haze is not marked with whatever is inside.
What I have found is about 12 sheets of 4x5 with a notch code that I don't recognize. I've searched the inter-web and have found many other codes, proving that it is not any of my favorite films.
It is a B&W film, that has two 'u' cuts about 3/4 of an inch a part. Now, to be clear, they are u like and not v like.
This link (www.silverprint.co.uk/PDF/FPD1e.pdf) to the Afga Datasheet PDF on the Silverprint web site has the codes for APX100 which do indeed look like what you describe...