1178-9 got the same treatment. On the Rohrs, the number plates were completely removed, and the roof numbers added. One would think it would be easier to leave the old numbers on and just add the other ones to the existing stock. The only interior difference was the door numbers, like these:
Otherwise, it was your typical Rohr, with nothing otherwise special added to it.
Also saw a non-Rohr pair with similar exterior treatment, as 2010-1 had roof numbers and the lower number scraped off. That looks weird, as you can see the old number "ghosted" on the carbody.