Since Charles is focusing on the modeling aspect, I'll go beyond the 3 WAG cabooses from that series and offer this. Some modelers are very casual about accuracy, some want something pretty close, and some want a very high degree of accuracy. Any of those are fine, it's your choice. But for those who might, for whatever reason, want top-shelf detail here's a word of caution.
We know there were 66 B&O cabooses in class I-10. My suggestion is if you want an accurate model of a given number, OR if you have a brass model to be painted, compare as many photos of a given caboose number with your model before just choosing any old number. Among the pitfalls -
Four of these cabooses were destroyed in the first few years of B&O ownership, before they could be renumbered with their assigned number. There was never a B&O C2611, C2612, C2622 nor C2648.
Four more were destroyed by the early 1950's.
Off the top of my head, at least 6 and probably more did not get upgraded in the 1961 program. Most of those were retired at that time, I believe one or two hung on a year or so longer.
Of those which were rebuilt, there were running changes as the rebuilding went along. Several of the earliest rebuilds retained the center window in the cupola ends, later ones didn't. There were at least two sizes of covers for the toilet vent. While not easily noticed, the sliding aluminum windows in the cupola came in 2 sizes. It should also be noted that those cars going through the rebuild program were done in random order, so such nuances were not always easy to see.
There were deviations from "standard" even among the rebuilds, with grab irons or handholds which were "wrong".
I'll again suggest those who care should get the aforementioned Volume 5 of Dwight Jones's "Encyclopedia Of B&O Cabooses", that book has an incredible depth of discussion, dates and other info.
Again, if you're not a "rivet counter" that's fine, no problem, letter and number your model as you wish. I hope this is helpful to anyone who wants to be exact.