It's a 57, best year for all Forward Look Mopars IMHO.
This was the year with two different headlight configurations due to state regulations.
I prefer the two lamp Version in General and the undressed trunk lid, but you can't be too picky with These rare cars.
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I actually preferred the 58 models a tad more, except maybe for the Chrysler 300C. In the case of the Imperial, it seemed the 1958 grille was more refined and upscale looking than the kind of simple grille in the 1957 Imperial. All great looking cars in 1957/8 though. The 59s were a drop downward overall I thought with excess ornamentation on some.