Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2890968.

This cover plate is for the back of a SR155 Ribber for a SK155 Singer/Silver Reed knitting machine.

On the ribber there is a racking knob that allows you to shift the needles left and right in half-step increments. A person had moved and the movers dropped their SR155 ribber shattering the original cover plate.

Fortunately I have a SK155 with the SR155 ribber, so I was able to remove and reproduce the part. The only difference between this and the original is I eliminated a void in the underside that is not used which made it much easier to model.