I don't have a Singer 211, I have a Consew 226-R, and it only has a "G" bobbin. I have the Consew 255RB-3, and also a Singer 144W204 which is a 20" long arm machine. I also have a Singer 236W post bed machine, but I don't have that up and running yet.
The 211 is perfect for covers, leather, etc. It has needle feed and drop feed, and is a walking foot machine. It's exactly like my Consew 226, including the feet, the tension, and a lot of other parts.
No one lives forever, the trick is creating something that will.