Caboose lettering

Here is a question for all of you NG gurus. On page 8 of R Robbs NG pictorial volume V there is a picture of caboose #60, on the Calumet branch (I think) The letterboard lettering has "Denver & Rio Grande" but if you look real close it is shadowed lettering similar to what was used on the passenger equipment pre 1890. My question(s) is this: Was this a one time application on #60 only? Are there photos of any other class I or even class II cabeese with shadowed lettering? I want to model this one in On3 and would like to know if this caboose got special treatment from the paint shop or if there are more like it.
Thanks in advance.
Gordon