Okay so its clearly a panel, not a suburban, the the flat split windshield means it not a '54 or '55 1st.

But with no wing windows, no door handles and no cowl vents on either side, how do you identify it as a '53? Frenched headlights, signal/parking lights in the front bumper, sunken plate custom rear lights. None of the usual clues are avaible. IF you assume the doors with no wing windows are stock, its a '50 or earlier, but that doesn't seem a safe assumption.

Please enlighten me.