I think to ME this is one of the main reasons polaroid failed, because all of their equipment and film was a big jumbled mess, pro's who had "been around" knew what was going on but everyone else was confused as f-ck about what goes with what, and prevented a lot of amateur sales that would have kept the company going.
The whole 664, 669, T55, T56 etc etc makes no sense and is just confusing to potential new customers...
That's exactly what I've thought, time and again. It's even harder coming into it now that most of the stuff's disappeared, there's dribs and drabs spread around the internet but nothing concrete.
Even Impossible live up to their name, their data is just as impossible to follow.
"SX70 film for SX70 cameras" - yeah, that's nice, but what about backs? They barely rate a mention, except some that say "we don't make film for them".
Fuji don't help either, they may make film but they don't use Polaroid's numbering scheme either.
I tried to find backs for both my Mamiya 645AF and Hasselbladski. You think I could find anything about what type of film they took? Obviously not the 'real' 4x5, but do they take '600' type, or 'sx70' type (or some other type?), any information? Some are labelled as "for peel-apart" type film, that's nice, but does that mean sheet or pack?
Nothing, not a clue to be found anywhere.
In the end, I took a $50 gamble and just bought a "polaroid holder" for my m645AF. Turns out it took packfilm. Took another $20 gamble and bought some FP3000B. Turns out it fits the holder. Still wasn't sure if that meant it was '600' or 'sx70' type or something else.
Took another $60 gamble, bought a "polaroid packfilm holder missing darkslide". Turns out my pack of FP3000B fits it. So I'm presuming it's a 405 holder, it looks like
this one. Cut a 4x5 darkslide down to fit. So now I've got some FP3000B and FP100C, and holders that fit my 645AF and 4x5, and I'm locked into these two Fujis until I take a gamble on something Impossible to find out if it does or doesn't fit.
Seriously, we need a sticky in the 'polaroid' subforum called 'navigating the minefiled of film numbers, packs, and holders', with a giant matrix of everything there ever is and was, what holder it fits into, and what camera the holder attaches to.