Information on the 1947-1953 parking lights The differences in the lenses are:
BACK UP LENS (B50 HOUSING - B29 LENS) ECCENTRIC PRISMATIC RINGS FROM BOTTOM TO TOP - ALSO HAVE TAPERED GASKETS BETWEEN LIGHT HOUSING TO FENDER
GMC PARK LENS (B50 HOUSING - F45 LENS) - ECCENTRIC PRISMATIC RINGS STOP AT 2/3 MARK AND HAVE A MAGNIFYING TYPE CLEAR GLASS TO THE TOP. ALSO HAVE FLAT GASKET BETWEEN LIGHT HOUSING TO FENDER
I believe that this information is correct, if not someone will provide the correct information.
