sprint wheels?

[whydidistartthis]

OK, Just a quick silly question?
Sorting through my sprint wheel collection, and came across one that appeared to be marked as 72?
Is this possible? Or are the layers of paint and corrosion playing tricks...

[mikeybish]

one would expect that the wheels would have been produced before the actual car production, ready to fit when the line started rolling. Having said that I have never spotted dates on any of mine.