1957 300c

[legbrkar@xxxx]

hi group ..gotta question for anybody..... on my data plate next to 
..so/fo..there's the number 2 now below the the number 2 there's a 6 and a 5 like 
this so/fo 2

6

5
can anybody tell me what this is a code for?
i know the car was made on 2-13-57 thanks bob mundo


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