[CR]Mystery steel track stem identification...

Hello list,

I recently acquired a '50s track frameset and it came with a very nice steel stem that I am unable to identify (there are no markings whatsoever on it). A photo can be seen here:

http://chainedrevolution.com/CS/photos/general/picture16.aspx

I would really appreciate any input as to its origins.

Thanks in advance,
Tam Pham
Sunny Huntington Beach, California