It was made by the Portman Sewing Machine Company:
http://needlebar.org/cm/displayimage.php?pid=6271
https://www.flickr.com/photos/sew_mach_tech/8168652446/
I don't have any experience with one. There was one that was for sale a year or two ago around Sacramento and I was tempted, but passed it by. I think someone here at QB has one...CD in OK maybe?