Mitsubishi Adapter FA1 What does it do?

[ComputerWizKid]

I went early morning Dumpster Diving and I found a NIB NOS Mitsubishi Adapter FA1 the Package is new and it appears to have never been used. I was just wondering what is was used for and if it worth anything as it is probably not made anymore
Thanks and of course here are the pics

Feel free to check out the rest of the coolfinds directory as I found a bunch of other computer parts also

 

[manimal]

bnc to vga adapter? rgb and sep vid hmmm

put it up for sale on fleabay, some foo living in his moms basement HAS to have this...