Today I finally got the machine out of the car. Discovered I had wrong serial number. Correct number is 493519. I also found that it was made in China. I checked into "mysingerstory.com" which provided a certificate that this number was issued in 1851-1870. The decorations on the machine depict Egyptian pharoh and scenery. There are no letters before the serial number and per www.sewalot.com/dating_singer_sewing_machine_by_serial_number.htm and prefix letters were not added up to 1900 and came from several factories around the world. Boy this stuff is confusing.