The first version with the stamped bridge did not have drain holes.
I am currently trying to get a time period to one that does have drain holes and does not have serial.
Growing up, I had a 82-83 pro racer. No holes and no serial
I bought a second one in 84(ish) and it had holes and a serial number
I currently own a pre-serial once again and it has no holes.
Now I have a friend that has a pre-serial with holes. So trying to pin point its age.
