Bernina Foot Rack.  Fits the following models:

Bernina 480, 485

Bernina 500, 530, 535, 540, 550QE, 570QE, 580, 590

Bernina 735, 740, 750, 770QE, 780, 790

Bernina 830, 880

Activa 125, 135, 145, 210, 220, 230, 240

Artista 165, 170, 180, 185, 640

Aurora 435, 440QE, 450