Yup, Lily ... I recognized it as I have it. If memory serves ... the Lily also has the model number 535.
OK ... I just checked the website
http://manuals.husqvarnaviking.com and apparently the "Lily" can be a 535, 540, 545, 550, 555. Pretty sure mine is a 535. But you can get a manual on the link I gave you.
BTW... I love my Lily!!