If you're still in the beginning stages of FW mania, I recommend you get a copy of Nancy Johnson-Sebro's book Featherweight 221 The perfect portable. It has a lot of info including a chart of manufacturing dates and info about the different colors and manufacturing sites and "eras". There is basically a copy of the original book with how to use the accessories that are common such as the ruffler, edger, tucker, gatherer,binders, hemmers (wide and narrow) and also common issues like how to thread, how the bobbin loads, etc. I couldn't decide if my FW was a good deal, we bought this book the night we saw it, read it from cover to cover, went back and bought her. Never been sorry.