By the way, I have named her Surprize. No surprise there..
. Her manual says she is a 319W2 model. Maybe the 2 is for twin needles? The flat discs that came with my 306 will fit her too and the manual states they will also fit models 238,240,248,258,316,320,338,348,360,418,477,478,51 4,518,538,818,838,1730 and 1800.