Feed Cover Plate, Vintage Original 66 & 99, 15 & 201, 237, 239 (NOT for Featherweight) Style:66 - 99 - 185 - 192 Chrome but they are certainly difficult

but they are certainly difficult to come by

Inspect the bobbin case base for any thread that may have been expunged - it is often a very small piece

Hook assembly is not included—it appears in photos for demonstration and comparison only

All that is left is to add it to your treadle cabinet

so that two different machines didn't end up with the same number

Feed Cover Plate, Vintage Original 66 & 99, 15 & 201, 237, 239 (NOT for Featherweight) Style:66 - 99 - 185 - 192 Chrome but they are certainly difficultFeed Cover Plate for other Singer models including the 66, 99, 185 & 192, 15 & 201, 237, 239. These are used for free motion embroidery and darning work using the vintage original Singer darning foot. Instructions for use can be found here. This plate will NOT work on a Singer Featherweight 221.