I just saw a breakdown list of the 1957 Chevrolet option ID breakdown and it looks like they had 4 different codes for the tinted glass . (1) E- Tinted Glass (2) EZ- Tinted Glass (3) EZI -Tinted Glass (4) EZW - Tinted Windshield . Since all Nomads were built in Clevland in 1957 I'm hoping they all used the EZI for the Tinted Glass designation . I can see how this Must drive the judges crazy . Bama , can you help again .