A good place to start would be the main page at
www.parkerguns.org and click on the list of links that are on the main page's left side. You will find lots there. plug in the ser# and you will find when it was produced and if there are existing records for it (and how to get them if you want).
If you post the ser# someone will see if its in the ser# book and report its configuration when it left the factory.