I am trying to register my 1970 something max but, I could not get the date of manufacture from RI based on the serial number. In cali, I can get restricted access if I have a 2 stroke manufactured after 2003 so, I want to see if there is any other way to prove the date or give some reasonable explanation ie: my serial is 5093 - is there any sort of date code out of this? Like 9th month of 73' or something?

Out of curiosity, does anyone else have an old serial number close to this that knows their date or at least year?