Quilter's Table, Viking #4131120-01 FootControlGetsAssembled The clear bobbin cover allows

The clear bobbin cover allows you to monitor your thread and easily install and uninstall your bobbin

as well as coloring pages and row labels

Elna Supermatic Sewing Machine Instruction Manual (Model Supermatic) - 59 Pages

5500 Memory Craft

Quilter's Table, Viking #4131120-01 FootControlGetsAssembled The clear bobbin cover allowsGuaranteed to fit Husqvarna Viking Sewing Machine Models: Brilliance 75Q, Designer Brilliance 80, Designer Diamond, Designer Diamond deLuxe, Designer Ruby, Designer Ruby deLuxe, Designer Sapphire 85, Designer Topaz 20, Designer Topaz 25, Designer Topaz 30, Designer Topaz 40, Designer Topaz 50, Eden Rose 250C, Opal 650, Opal 670, Opal 690Q, Tribute 140C, Tribute 145C, Tribute 150C