This video seems to be a real nice example. Mine seems to be missing what ever goes on top of the rear "spool bump" also the one pictured has a low mounted bobbin wonder, mine has a wheel mounted one and yes it is incomplete, but since it is a "15" class bobbin and hook I am hoping a winder from a 15 will work.
http://www.youtube.com/watch?v=iYiLi...e_gdata_player