Singer featherweight tables have metal legs, serial # and wood tops, I have 2 of them, plus my mother in law used to work for Singer Sewing machine company and that is all she sold. The serial # tell what type of machine will fit the opening.
I think it's a card table that was made in the 1930 or about that time. I have one that has wood legs and a vinyl type top, not sure what the top is made of.
I have a treadle base that I had a new top made for a feather weight. Lots of cabinet shops will make one if you don't rush them for a reasonable price. You will need to take a drawing to them with the length, width, cut out size and type of wood. Lots of time they make wrong cuts and have scrape boards, a lot cheaper.