Your machine looks very nice Cari, I have to go for one with a potted motor next time I see one at the right price. Yours has two round metal bits, are both for spool pins? I haven't seen that before. The ones with the plate have a molded edge in the cast iron, making it totally flat for the plate to go on. There's three holes in mine, two are oil point and the one in the middle is for the spol pin. Maybe thats' the way to tell if a machine is missing the plate or was made differently?