This is I understand is a 1978 Roland gr500 guitar together with a 1983 Roland gr700 synthesiser. Eight years ago I had the gr 500 cable modified to drive the synth,as they were,as indicated by the dates manufactured, incompatible .Resulting in a perfectly working unit.The guitar is in good condition with some wear and tear one might expect from a 40 year old instrument. The machine heads are Grover. There is some minor damage to a small plastic part on the bridge that holds the treble E string, I have indicated such with a match stick on the photo.The portomento switch could do with attention as it feels loose. None of these imperfections appear to affect its playability.Both units are in original cases. This is a unique and remarkable instrument.