Any idea why, in 1969 some of the partials read "19N" followed by the last 6 vin digits and some read "9N" followed by the last 6? Any rhyme or reason? Any particular trend?
Norwood vs Van Nuys?? Just a guess, sorry for no proof or concrete evidence.
Most are 19N
Which examples do you have of being different? Is the 1 just stamped very faintly?