Very interesting, and sure would make an interesting model (hint hint) to go with the others
(http://gearedsteam.com/baldwin/advertisements/st_louis_lumberman_pg115_may_1_1913.jpg)
(http://gearedsteam.com/baldwin/images/BLW_1_cn41858.JPG)
(http://gearedsteam.com/baldwin/images/lr.jpg)
I've always liked the last loco you show. It has a long and sleek look, as though it was built for speed. Complete contrast to what it was capable of, I don't doubt. In large scale the climax trucks under a big hauler boiler with a combination of big hauler pistons and motion and climax eccentrics might give a rough imitation.