Vintage, Singer tucker 160692 that works with class 301 machines. The included instruction booklet has a copyright of 1924, 1932, and 1933. I don’t know if this can be used with the Featherweight or not. Some parts are interchangeable, but I don’t know if this is one of them.
The bottom of the box has water damage. I found a tiny rusty spot on the underside of the tucker that I don’t think will have any effect, but I could be wrong. Just be aware that it’s there.