I can honestly say I didn't even know SIMMs like that existed. Neat! Must be for some sort of parity or ECC type of thing? I've seen 30-pin SIMMs with nine chips that all fit on the standard size card... I might be concerned that there might be a compatibility issue in addition to the physical insertion. Or maybe the system/card would just ignore the extra chip. If its not obvious from my statement about not knowing they even existed before now, I cannot speak authoritatively about them.

As far as the physical insertion, from the pictures it looks like they would fit on the SB32, but I suppose you can only tell so much from pictures. They would probably fit in 286/386/486 machines as system RAM (depending on the motherboard layout), but my suspicion is they are designed to be used as system RAM in server systems.

I've seen memory modules vaguely similar to those once before. There were even further extended to one side though, kinda like someone copypasted the PCB to one side with the 30 pins all located on the other side of the module.
There were also some wires soldered between these 2 halves, but I never got a chance to take a real close look at these modules as these came out of some very old machine at work and the boss err...kinda kept these for himself and I quit not long after that.

But there are actually quite a lot types of 30p memory modules, I even created a thread about weird memory modules like a year ago?

I do have a couple 30p modules that, instead of having normal memory chips or those weird drops of black stuff (Topless?), these had a couple metal cubes with IBM part numbers. I presume many of the more weird memory modules came out of machines that are not even real interface computers, but were used in other types of machines like printers or something.

Even if it seems it will and should fit, it doesn't mean it's supposed to.

A specific oem ECC interpretation or something akin to that?

That might be additional memory for a specific printer model or a similar peripheral. Many laser printers back in the day could be expanded with memory that was used to load additional PostScript fonts. It probably won't work in a PC. A quick googling shows Hyundai made (makes?) printers, too.

I too though they are for some specific brand/model. For printers...intresting.

That gap is too narrow to fit for "generic" sockets. They might fit sockets like on that A2000 board (no levers on sides) if carefylly cut/file that gap wider? I checked Impact2000_SeriesII.pdf http://amiga.resource.cx/exp/impact2000hc8 "GVP uses
1M x8 SlMM’s" so they would not work?