The expected oil drip pan arrived and has been attached to the bottom of the Singer.
Curious to know how the felt pad was attached to the pan, I lifted a corner and it separated into my fingers. The pad has a slightly damp feel and if you put your nose to it, an unpleasant old oil/grease smell. It is not noticeable when the cover is attached to the machine. Even so, first impressions have prompted me to order a new pad.