"this loco was, indeed, built in October 1919 as PRR 20030"

...does this make it quarry fodder? :-)

Greetings:
Just as a guess, the Pennsylvania purposely numbered these (and some Russian Decapods, among them former Frisco No. 1630, now at IRM which was PRR No. 1147) out of their "normal" (read Standard Railway of the World/weird) numbering system because they planned to dispose of them just as soon as possible after being released from the oversite of the U.S.R.A. (which forced them on the PRR).
J.David

If I may run on a bit (it's late at night), Sloss Furnace is a perfect place for this engine. Freight engines like this only have historic meaning in connection with the commodities they hauled. In the printed matter to support our fund-raising hustles for Pere Marquette 1225, we make the connection between our locomotive and Michigan's auto industry of the 1940's. Local agencies and the National Park Service are starting to market the surviving historic auto plants as heritage sites, and we figure we deserve a piece of that action, for whatever it's worth.

Incidentally, the factory where Henry Ford designed the Model T is still standing, and partially restored for museum use. Although stripped of all its machinery, the structure is still in perfect, original condition, and in Detroit that's saying something. The bay where Henry had his first office still shows where the finished walls were. And the room that was walled off for secret Model T design work is still marked by the nail holes in the floor for the partitions. Curators are trying to figure out, from the mounting holes in the floor, just what machine tools were installed to make the test prototype. In terms of impact on the world economy, this is roughly equivalent to being able to walk into George Stephenson's workshop just after he moved out for larger quarters.

Stop by on your way to TrainFestival 2009.