1970 Chrysler Newport VIN question. 0 (zero) or letter “o”

As some of you know, I have 2 1970 Chrysler Newport coupes. I just noticed the titles for both of them show the VINs as CE23LOCxxxxxx. I was wondering if the 6th digit O is the letter "O" or the number 0? My insurance cards show them more looking like zeros and the vin tags looks like zeros. I'm sure 0 and O could be used interchangeably but I would just like to know for my records what the 6th digit actually is .
Author: kingbowl93