When was the Yellow light MPX stereo introduced?

[Jeremy]

I dont believe I could get a clear picture without pulling it from the car. My only real concern is that the Yellow light is correct for the time my car was built. I am very pleased with everyones help, Hopefully CRG will narrow down the changeover date within a couple of weeks. Here are the rest of the numbers anyway. Serial#31FSA, Model#91BFM2, Product#730733 and 9044 is after the model number. The sticker in question is on the opposite side of the radio, After looking harder I could see "CONT" on the same sticker with the 5149. Any idea what Cont means? There is an original 69 RS/SS at work with a blue light stereo, It has the same model#. It appears to be the same radio other than the light? Thanks again..