hi, it seems the best way to go with the acrylic, less chance of chipping, i think its possibly a MR replica, engine number is 51m16.. its got the sighned tank frame matches engine, the number 1s are upside down to the other numbers,the tank needs paint job to, was looking at rear sprocket and its got the m logo and special 33 on it front has 9 teeth, want to make top job of it