I have a 237 that was my mom's and I'm just now getting around to sewing on it (had to get a tension thingy for the top since mine had broken off but it still sewed once I fiddled with the tension). I've read that it will treadle (haven't tried it myself) but it's simple - even I could figure it out once I got going - needle has left center right, It hink 5 zig zag settings then a stitch length/reverse lever. super easy.