Was Billings to Omaha ever a Zephyr?

["wollffee <wolfee@o...>" <wolfee@o...>]

Or just another connecting train? I finally found some pics of the 
Billings to Denver #30, and can't believe it rolled within 3 blocks 
of my house here in northwestern Denver suburbs when I first moved 
here in the '60s. Does anybody know if #30 was officially referred 
to as the "Nightcrawler" or was that just a nickname the riders gave 
it?