Champion 77: Serial number?

My machine has a number stamped on the left side of the head main casting... I'm wondering if the this is any sort of numerical order?

So this one has A103 stamped into the casting, any other numbers out there?

If anyone knows of a catalog or historical record of these machines please share.


There are red and green Champions out there, I'm thinking that the red ones are earlier and the greens are from the Landis period? Any ideas?

Here is another machine @ O2415