At a 2nd look im sure its a B model
B tank, B swinging arm, b shocks , b air box
for a concourse paint way to glossy, wrong grips,alloy too polished,no fork covers,wrong bars,lever covers, kill button,various fastners wrong,and a lot of pitting and scratches .
To adverise somthing as new is a big call.
It is a nice example though
im sure its a 77 b model though.
Im off back to the train station