Strange RK03 / RK05 clone with Plessey-controller

Hello everybody, just saved a disk drive with a PDP 11/23 from being trashed. Unfortunately, someone came before me and took out several parts of this beastie. The most interesting thing: A Cipher disk drive Model: SF-1221 with a Plessey controller PN: 703340-101J. A 50pin cable goes to some sort of Plessey converter, another 50pin cable from the converter to the cipher drive. The drive needs to be cleaned. On the front panel, a little plate is missing which may have housed some buttons... Moreover, I found a disk pack which goes with the drive: DEC 2200 BPI-12 Is this a RK03 or RK05 pack ? Concerning the drive and the controller: Google turned out NOTHING. Who can give me little help identifying these peripherals ? Thanks alot ! Pierre ______________________________________________________________ Verschicken Sie romantische, coole und witzige Bilder per SMS! Jetzt bei WEB.DE FreeMail: http://f.web.de/?mc=021193