I know most here are, like me, a part of the PC Master Race, but I have a handful of Macintosh computers of various architectures in my collection, but one of them have a device that really puzzles me, so I hope that some of you might know what it is...

I have a Macintosh SE assembled in 1989 with the 800k Sony FDD (and supposed to have a 20 MB SCSI HDD). The old SE uses a special expansion slot which I forgot the name of but also is irrelevant in this matter (as far as I know) as the device in question is not even able to connect to it, instead it goes directly into the logic board's 14-pin power connector and has a similar connector in the top to act as a passthrough. On the side there is a five clip "piano" connector which is connected to a back plate with a female DB9 connector and a wire from a pinout called "CLK" to a hook-clip connected to Resistor 29 (in the books I have I can't see what this one is for). The only tell tale I have been able to find is a silk screen text "NVIEW 871201" on the back a logo(?) I don't recognize with a "1" and "94V-0" after.

It might be a very long shot, but hopefully someone have a good idea of what it is... I doubt that I can use it for anything but just knowing what it is would be cool.

If it can help, the computer was originally sold in USA.