I am still undecided about the various front re-designs that were made to the PRR T1. The front was made squarer and the portholes done away with, and also the valances changed so that the cylinders were partly exposed.
It is difficult to see from the linked to photo but the livery was a very dark green.
There has been a discussion about them on the papermodellers forum. I am thinking about designing one for one of my model kits and eliminating errors in the original Micromodel version.

The S looks more the pure art deco style to me.

Robin