Randa, here is a New Home Rotary manual, but I think they thread about the same.
http://www.ismacs.net/newhome/manual...ary-manual.pdf
I also have a New Home shuttle type manual. I will find that for you.
Nancy
Here is the shuttle New Home. This is from the Smithsonian so it is a little harder to download!
http://www.sil.si.edu/DigitalCollect...es/image11.htm
Your attachments should have a fork on the back since your Amerikan is a back clamping type machine, anyway it looks back clamping to me in your picture!