Wow, quite the wealth of information......I don't think I know that much information about my car...and it just out in the driveway!!!!'CPD" and the numbers to the right are police serials. The big numbers in the middle is a Murray serial, which doesn't tell us anything. "MOD 502" is a Sears code on Murray built bikes. The next # looks like 4740, which is the Sears catalog # for a 57 mid line model. There may be a Murray code to the left of that, "MOST-W" would be right for a 57. -Adam
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