Hi, The "highway hifi" factory option code is 345 on the 1957 data (radiator) plate. Remember that you must read this number in column (see exemple on http://www.ifrance.com/c-i-f/dataplat_us.htm). Seems that ther's a lot of "345" code on '57 Imperial data plate but Chrysler Historical confirms that 345 is well the hifi phonograph... For '56, it's " 5 & 7 " (???) --
Philippe COURANT (Pau, France)- Webmaster des sites ACCF et C-I-F Imperial 1957 Crown convertible Buick 1996 Roadmaster wagon
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- Chrysler Imperial France (C-I-F) : http://www.ifrance.com/c-i-f
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