Hi Sherry,
   I had a question about the plow no. 33X SC.  I figured out that the S and C probably stand for 'short' and 'common' codes for plowshares.  However, isn't the 'X' a denotation for either experimental or the plow was designed for a foreign market?  I am stumped on this.  Can you help?
Thanks,
Travis Childs
NICH