I don't think the serial number will help much for this machine.
As Leon said, the leaf tension will need realigned. There are a couple of threads here on QB have picture of how the leaf tensions are supposed to be lined up, one even threaded.
Need help identifying machine and parts
Need help identifying machine and parts
I hope you have a good supply of sewing machine oil.
Janey - Neat people never make the exciting discoveries I do.