The treadle's decals are "Tiffany" or sometimes called "Gingerbread". I believe it's a 115 though according to ISMACS 15's also had that decal also. They used the decal from circa 1900-circa 1930.
Try a 66 bobbin on the bobbin winder. You will be able to slide it onto the shaft but you should have a difficult time pushing the bobbin winder down. The bobbin should be too narrow. That was how I discovered that my mil had mistakenly purchased 66 bobbins for her 15-91.
Last edited by pennycandy; 07-11-2013 at 01:18 AM.