I am currently reading a book on Vienna by Andreas Krennmair who is Austrian. Apparently, the Vienna Anton Dreher brewed was not a dark beer. It was not a pale as Pilsner, but Anton Dreher is credited with bringing English smokeless kilning technology to Austria and Germany. After reading this book, I believe that the BJCP SRM range is way off of the mark.
According to the booklet titled "Vienna Marzen Oktoberfest" by George & Laurie Fix from 1991, the color range for Dreher's Vienna was estimated at 8-10L. One of his brewers brought the style to Mexico/Texas and increased the color to 10-12L by using a small amount of black malt. They compared the color of Bass Ale from 1991, which they listed at 10L.
I was in Vienna in 2010, and could not find an example of any non-Heineken beer near our hotel. Only there two nights, with a lot to see, so I didn't have a lot of time to venture out on my own. This is a historically wine-drinking area, which held me over until I got to Munich.
What is interesting to me about Dreher, is he is credited with bringing new processes, techniques, and a new beer "style" to Austria. He's also credited with created vienna malt. In fairness, his life-long friend and friendly competitor, Gabriel Sedimayr did something similarly successful to a failing brewery in Munich named Spaten. I wonder what these guys would have thought if someone told them their beers do not meet a guideline like the BJCP? I'm not trying to start a conversation on that subject, just personally think its interesting.