Pretty machine. It looks like one of the Japanese Clones. The Japanese were able to copy Singer machines after WWII and this looks like one of them. I have found that the bobbin winders on the Japanese clones work better than the Singers of this time period. Look underneath for the ID#. And Billy and others on the Vintage Sewing Machine thread will be able to tell you more about this machine or point you in the direction to find more information.
Have fun sewing with this pretty machine.