restoring a 1947 lincoln zepher..wondering what the purpose and reason is for the...

  • Thread starter Thread starter alzdream139
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alzdream139

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...blue gemstone like glass is? in the middle of the left tail light...none in the right?
 
That blue piece was added by a previous owner. It's called a blue dot. When your lights are on or you hit the brakes your tail light appears to have a purple tint. It was big in the 50's on hot rods.
 
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