Clinchfield 4-6-6-4 Challenger #670 Black/Graphite, Yellow Lettering, Coal Fired, Single Stack MRC Sound and DCC. Discontinued at Athearn. See photos for more details.
Union Pacific 4-6-6-4 Challenger #3964 Black/Graphite, "Aluminum" Lettering, Coal Fired, MRC Sound and DCC. Discontinued at Athearn. See photos for more details.