I have one just like that, and the manual that came with it says it is for a 15-88 and 15-89, and the 15-89 is the hand crank version, so I it should be the 15-88.
The 15-96 looks like it has a different style of stitch selector, while the 15-88 has the same style as the 15-91.
Last edited by mlmack; 06-15-2013 at 04:39 AM.