Http://www.singerco.com/uploads/download/452_5_8_10_16_22_dial.pdf is the manual for the machine. The bobbin case is a single piece, and looks like: http://www.sewingpartsonline.com/bobbin-case-body-singer-383913-901.aspx?gclid=COqlw9-9yL4CFQqPfgodiC8A6g I don't know of a diagram of it.
Answers & Comments
Http://www.singerco.com/uploads/download/452_5_8_10_16_22_dial.pdf is the manual for the machine. The bobbin case is a single piece, and looks like: http://www.sewingpartsonline.com/bobbin-case-body-singer-383913-901.aspx?gclid=COqlw9-9yL4CFQqPfgodiC8A6g I don't know of a diagram of it.