Corvus Concept w/printed model/serial/rev plate
  serial 293-E0442-R
  model WSB-2
  revision A

Contains:
  Corvus Systems Processor board
  Corvus Systems Corvus Concept Memory 8051 REV. daughterboard 
     w/512KB installed (full board)
  Corvus Systems Floppy Controller in slot 2
  Corvus Systems Apple Interface Card in slot 3