An excellent condition matched Studer 1.820.723-11 Multichannel Bus Driver Card for the Studer A820 analog reel to reel tape recorders.  This was pulled from a working system, inspected. 

I have no reason to doubt this card functions but, as I cannot test it, it is being sold As-Is

Attention - I have more Studer cards from the same machine available in separate auctions.