Originally Posted by purplefiend

The 66 is a wonderful machine. Both of my machines have the red eye decals, #1 is a 1910, #2 is a 1916.
The needle goes in with the flat to the right and threads from left to right. As the others have said, stay away from cheaply made bobbins; they cause no end of problems. I only use vintage bobbins in my machines when I can. I have a 201 and 99K that also use the class 66 bobbins.
The machine shown is the 1910 and it was a free machine, because it was locked up with old oil; it sews beautifully. It is in a "franken" treadle made from a Singer top and Elgin irons by Free.
Sharon W. in Texas