Ben said:

>Bullet indicators finished in '62 but 612483 would definatly
>make this bus a '60.

Then I have proved nothing, since Steve said the number could also be
read as 672483, which would be a '61 according to the NEATO list.

My source for the change over date from bullets was 
http://killer-whale.automatrix.com:80/~skip/volkswagen/early-diffs.html
Tom F.