hi , napco man what is the main differance?

only i,m in the process of buying a 55 2nd series

humber on the plate on the cab door pillar = M255KO38183 which the vin busters says is 1955 from kansas mo

the number on the chassis = 53L123942 which as far i can find out is 1953 from LA

I,M CONFUSED the chassis frame looks as if its the correct one i wonder if there,s some mistake in the chassis number but i cant get over to where the truck is at the moment

HELP please


live or die do it with spanner in hand