After reading your inquiry, I went down to the workshop and got some numbers in case anybody else was interested.
The Gauge Logo, was done on my Compaq ink jet printer, on Vita -Cal decal sheet, it was clear and wasn't gonna show up on the blue, so I put it on a .020 piece of styrene and glued it to the sides. I ordered white sheets for the next cars.
The reporting marks are Micro-scale Railroad Roman(87-69-1) the "Keep It Gauged" (Thanks Ken) is Micro Scale New Haven Gothic- Extended(90081) and the data is Herald King "Modern Boxcar" (D-2W) which included enough to do three 50' and three 40' boxcars. It also had door and even brake shoe data.
Hope this helps.