Originally Posted by BoJangles
Nannie, the Singer Redeye could be a 66-1 if it is a back clamping foot and older than 1923, or a 66-3 if it is a back clamping foot and originally a hand crank or a 66-4 if it is a side clamping foot. So to tell you what 66 you have I'd have to know its year and the way your foot attaches to the bar.
Nancy
Lots of times the back clamping needlebar was changed out
for the side clamping needlebar to enable the machine to
use the more common low shank Singer feet.
My 66 redeye is from 1910, I searched a long time for one and finally got it this past April.
Sharon W.