Today our local Craigslist had this for $20, and it sews. Came with 20 cams, 6 presser feet, 4 screwdrivers, 5 mismatched bobbins, and a bent seam ripper. It's runs smoothly and makes stitches and zigzags. It's from Taiwan and has the tag from 1973, with English and Chinese. Threading was intuitive and easy, and so was the presser foot pressure adjustment and the drop feed. I haven't tried the cams yet, but even that looks pretty straightforward. Only fly in the ointment is the lack of an owner's manual. Does anyone know where I can get one? And maybe some liniment for my back? The thing weighs a ton, with I'm guessing maybe 15 pounds or more being in the extremely sturdy carrying case. The red sticker is in front under the bed.
http://www.singersewinginfo.co.uk/taichung/ has the information that the factory in Taichung, Taiwan started making Singers in 1963, and that's about all I found out. With all the nice features, you'd just expect it to have a light, but it does not. Not a problem, really, but how odd!