Thank you for responding. The two feet that I recently bought are for a Pfaff 467 and that's where they may differ from feet for a 467R. You can see the walking foot setup in the manual, it's quite a mechanical wonder, at least to me. These feet are sold as single feet without a second foot like what I purchased for the Singer. Are there any sources for the correct cording feet for the Pfaff 467R that you're aware of?
As for the Singer, there's only one button on the bed, about 2" behind the bobbin cover plate and I don't see a second one anywhere. When I depress it it does lock the feed eccentric so I believe it is the correct button. Also, the pulley/hand wheel doesn't move in either direction whit the button depressed