I was cruising CL and ran into this: http://richmond.craigslist.org/atq/3335352345.html
It looks like a Red Eye 66, except for the part where it's got BOTH the slide plates for a bullet shuttle AND the standard 66 bobbin case. I know Singer did some retrofitting, but this? I've never seen before. If not Singer, who, and how, and why??
It's close enough and cheap enough that I could be tempted to hop up there this weekend and check it out. But in the meantime, has anyone else ever seen anything like this?