Your '53 is not a "first series" anything. First series refers to '55 trucks that look like '54s. Some people also refer to '47 trucks that look like '46s as first series.
Just out of curiosity...is a 52 a 1st series?
I only ask this, because some of the truck part vendors call 47 through 54 1st series while the 55 through 59 is a classified as a 2nd series...any clarification...?
