help identifying an Alps stepped attenuator

[jscherer]

I picked up two of these today and can seem to find any specs on them. I can confirm that they are 2 x 100k but these are stepped with 11 positions. Anyone have any other details on these ?

numbers on the back are:

7921 - 100K X 2
220359-1

 

[jscherer]

Heres a pic of the device

I think the first pic I attached may have been too big