Jolene is a Singer 201, as Cathy says. And you are lucky, because the 201 was voted the best all-time machine by the sewing machine dealers of America.
I have a cabinet just like yours and it has A Singer 127 in it. I love that cabinet. It sits proudly in my living room. I cleaned up the cabinet and restored the machine, which hadn't sewn for 40 years. I might trade or give away the Singer 127 head, as I am not fond of the bullet style bobbin, but I'm keeping the cabinet! I'd love to find a Singer 201 treadle for it.