White and blue 3-striped preseason-only jerseys have chisel-top 1s with no lower serifs.
New white and blue jerseys with shoulder stripes have chisel-top 1s AND lower serifs.
Improved size/position of front/back numbers.
Lightened navy of all other blues to more of a dark royal blue.
Added 4th 'preseason only' to 1957. (1956 style white jersey with 1957 style helmet - worn 9/21)
|9/21/57 - BALT v CHC @ St. Louis, MO|
|12/27/59 - NYG @ BALT|