Upper feed walking foot  fits:

Babylock: BLQP Quilter's Choice Pro, BL500A Jane, BL510A Jane 

Brother:  PQ1300, PQ1500, PQ1500S Nouvelle  (#XA7253001)

Janome: 1600P, 1600P-DB, 1600P-DBX, 1600P-QC, MC6600 (#767403016)

Juki:  DDL-8700, TL-2000QI, TL-2010Q, TL98E, TL-98P, TL98Q, TL98Q (#A9150-E98-ZAO-O)

Pfaff:  1200 Hobby Grand Quilter

Singer: S16 Studio, 331K1 

Viking/Husqvarna:  Mega Quilter 1200

Alternate part number:  #77197