Found a old gitane at a yard sale. question is witch model is it? it has intergrated derailer hanger with adjusting screws on rear drop outs. nervar cranks mavic module E rims . problem is it looks to have been repainted on the top tube, where the model name usually resides, according to the pics ive seen at the gitane web sight its a 83. the question is how can I tell without a model name??? any clues guy's?