"1972" Hot Wheels Redline Superfine Turbine in Light Blue, Made In Hong Kong.

The Superfine Turbine, designed by Larry Wood, is one of three castings that debuted in the 1973 product line that were never used again. Since the Superfine Turbine was produced for only one year, it is one of the hardest-to-find castings.  Light Blue is one of the most common colors along with Dark Blue and Red.