1950s era ATS on steamers (AT&SF)

Model Railroader Prototype information for the modeler
1

I am looking for photos of the ATS equipment in the cab of the 2900s 4-8-4s
This is a shot of the mounting plate in the cab,

but I need to know what the equipment that was mounted there looked like.
Thanks,
Gunns

2

was looking through posts and saw that no one responded thought i would. would not googling it work, engine backhead or something? Not a die hard steamer but are they not all the same basically?