While I have had my ups and downs with Richard Schwinn, who owns and runs Waterford Bikes (his plant is the Paramount factory in Waterford, WI), if you go their website and open it you will find a listing along the left side that includes "Velorotica". Click on that and you will get the history of the Paramount and everything you ever wanted to know, including how to date and size a Paramount frame/bike from the serial number. Quite interesting and fairly complete.