There are a few pictures in the Needlebar on your Free Westinghouse AAE. Uses a short needle called Free Rotary, CC1221, cc, or Boye 2-1/2 which is shorter than the universal or 15x1. My understanding is 206x13 are also too long and not a substitute for Free Rotary needle.
http://needlebar.org/cm/thumbnails.php?album=298
Jon