HELP identifying PCB please

[sonolink]

I found 4 of these in a box. I must have bought them from someone in the forum but can't recall who...
I guess it's a mic input board but I have no idea what circuit...any ideas?

 

[sonolink]

No one?

 

[[silent:arts]]

It is Igors kind of "go between". Put it in front of your mic pre.

 

[sonolink]

Thanks Volker!!!

Oh but Igor is gone so getting schem and BOM is going to be a pain 
Thanks for your help anyway!

Cheers
Sono

 

[sonolink]

Found it!! It's Igor's Universal Board
Thanks Volker!