I was wondering if anyone could help me with some more information about a polaroid camera I picked up a while ago that I've been trying to research recently. On the front it says Instant 15, but online I can only find information on Instant 10, 20 and 30, which are also the only models mentioned in the manual (see photos). Is the Instant 15 an interim model between 10 and 20, or could it be a knock-off of some sort? I'm assuming it still takes 88 film (which I know is almost-impossible to source now) but would love any insight about this anyway!