Advertiser in Holland says it's one of two power units that were custom-made for Edwin van Huik. From left to right, the front has (1) two XLR ins, with perhaps a small switch, (2) a big red switch for Stereo, Reverse Stereo, A+B, A Both, B Both, (3) two sets of jacks labeled A and B, and (4) two XLR outs, with two pairs of small switches. The photo doesn't show a model number ...
Oliver can only be looking for the unit that Michael (dela217) is describing - although this one probably comes close.
Nice Series I there (S/N 79 1?73). Asking price is a bit steep if you compare to US market - 5000 EUR = 7500 USD, but the first bid is half that.
The special power unit is offered separately for 950 EUR - seller says comparable to an SF2, but that's plain nonsense.
(Message edited by adriaan on July 29, 2008)