I have a couple of smooth sided C&O Pullman standard 52 Seat Passenger cars.
The directions say place the decal for the car number in the middle of the car. Yet I can find no photographic evidence of this.
I know the fluted side C&O (Yellow Blue Silver) has the decals off to one end. And I bought two used passenger Pullman Standard smoothside cars which has them also sitting on the end of the car.
The older Heavyweights had numbers at both ends if two sets of numbers were provided (Or in the middle if one set of numbers was provided).
So if someone has a C&O passenger book out there has a picture of a P-S coach could let me know. I would appreciate it.
The only picture I could find was this:

I believe the C&O standard was to place the car number centered on the truck kingpin at the blind end of the car. but then I see baggage cars with the number in the center? Good question!
http://rrpicturearchives.net/showPicture.aspx?id=556658
Here’s a link to some decent C&O photos that may help…
http://passcarphotos.info/Indices/C&O.htm
Have fun! Ed
Ed’s on the right track, though the placement varied, depending on the equipment.
The C&O Pullman Standard streamlined cars from the 1950 order had their numbers centered over the truck pin on the non-vestibule end of the car, like the photo in the first post in this thread. This would include the coaches that Don was asking about.
The 1946-built ex-Pere Marquette coaches and diners had their numbers centered above the truck kingpins at both ends. The ex-PM streamlined baggage/express and RPO/express cars delivered at that time had numbers centered above the truck kingpins at each end until the cars lost their fluting in the late 1950s. After that, their numbers were centered on the car side.
The few Budd-built stainless steel cars the C&O kept that had been intended for connecting runs to the stillborn Chessie streamliner had their numbers on plates at the center of the car.
Heavyweight cars that were repainted into the tri-color scheme mostly had their numbers centered on the car side. This included the majority of the head-end cars the C&O owned. In cases where a door or other obstruction was in the way, they generally shifted the number a little to the left to clear the obstruction.
Their heavyweight diners had their names centered on their sides, and numbers centered over the trucks at each end.
Excellent information from you both. Thank you!
Looks like I have some decal scraping to do.
-Don H