The Singer 347 is exactly the same as the Singer 457 apart from the 347 having a thumb screw for the pressure on the foot and the 447 having a dial, if you type this address as you say it not as you see it you will get a manual, thgis site does not allow email address to be shown.
www dot sewing-machine-manuals dot com click on relics and find your model or you can contact maurice at mauritron dot com
kendourof, November 2010