The "E" in the serial # likely stands for "Eveland's" which is the manufacturer of Scamp trailers. "MANS" could be "MANufactured by Scamp"
Trailers didn't have VIN numbers in 1970.
If you have a new number issued by the state, then you could simply stamp it into the top of the RH tongue using welder's stamps, and obliterate the original.
As for the 1970 title simply assume they made a few before JAN.1971.
Now you have a correct title issued by the state.
These trailers were sold
with a certificate of origin with a title issued by the state of the buyer's residence.
Some states didn't even title trailers under a certain size.
If you own it and you know it and the state has given you a title...
Don't Worry be happy.