Hi. Can yoy please help me figure out which bike is this??

[stalemate]

hi friends. I want to buy this bike because the transmition, It is a XT 15 SPEED But, witch brand is this?It has value?. thank yoy very much

 

[Hotwheels.]

Looks mid to late 80’s, decent spec and great condition... what do the decals say exactly and what is it’s serial number, this might just be another clue?