Originally Posted by Barbm
I couldn't see a model # on the Singer- so maybe it could be a 99.
A featherweight will always have the left side of the table able to flip up. It is hinged. (There is a more rare type of featherweight in which the left side of the table can actually be removed -- it is not hinged -- but I doubt you would find this at an estate sale.) If the table is all in one piece with the rest of the machine, it is not a featherweight.