For sale is a vintage Singer emblem "badge".   I don't recall what type of Singer machine it was removed from.  Think this particular one is found on a lot of Singers, including 66, 221 and others, but too big to be for a Singer 99.
 As often happens (because it is not real easy to remove these emblems), the rivet holes were stretched a bit during removal, but not too big for the pin heads, as can be seen in last photo where I propped it against a pencil.

Thanks for looking!