The clone didn't come with that cabinet, in fact it's about 1/4" to wide to fit. I have a metal plate that fills in the gap, should say I found it laying in that trailer, bit it screws to the rear under side of a machine. I does seem like there's a singer in all these machine that has screw hole under the bed. other wise the only machine I know of that uses that type plate is my Brunswick treadle.
I've tried to post a photo close up of the pedal in the cabinet, it won't load. I have it sanded down , there is no question in a factory singer cabinet, ( usa ?? ). mid to late 30's they went to the tube straight leg. Those were always painted brown , same as this iron work.
on the machine it has feed drop, but it's like a singer under the bed
I just got an other Tiffany today, sure as shoot'n it's a 15 ;(