This model 400W18, is super heavy-duty and in really nice shape. It runs very smoothly. It comes just as it is shown. It appears to have an on-board bobbin winder (2nd pic). It will need a bobbin cover/case. These are available on-line through numerous sellers for $15 or less. It is an auto-oiler and was designed to run north of 4,000 stitches per minute. One could easily make it a variable speed machine by replacing the existing motor and controller with a servor-equipped unit. From what I've researched, the servo motors appear to be reasonably priced. Replacement needles (135X7), and bobbins are readily available too.