Ampex ATR700, 1/4" 2 track, balanced mic and line inputs, balanced outputs. This unit has 1/4 track Playback heads in addition to 1/2 track. Very clean, tested and working, will likely need recalibration and realignment to match your particular tape stock.   These machines tend to develop some intermittent switch conditions from a lack of use.   Generally these issues are quickly resolved by exercising the controls for a few minutes.