Casey Jones TV show

Got the whole series on DVD this week off of an Ebay dealer.
The first episode entitled "night Mail" was broadcast on Oct 7, 1957.
Rather interesting combination of footage, too. Lots of stock shots from "Ticket To Tomahawk" train scenes showing the engine, combine and caboose. The rest appears to have been shot Travel Town in Los Angeles. The Oahu No. 85 (re nu as No 1) and the passenger cars are extensively used. Toward the end of the episode two narrow guage trains are running side by side at TT. The engine on the right appears to be
Mr. Markoff's "Eureka"?
Answers?