I found this in the town of Windsor, just outside of London, England. The way it is displayed, there was no chance for a clear long-shot. So, here are more details.
Peirce, those are fantastic photos. Does the right half of the builders plate read "Great Western Railway"? Was (Is?) the Queen gauged at 7 feet for Isambard Kingdom Brunel's GWR broad gauge experiment???
The only builder's plate I saw (or part thereof) was what I photographed. It clearly has the words "Great Western Railway Company" on it. I have no information at this time on the rest of your question, but maybe our Brit members can help out. I did find a little information here: http://en.wikipedia.org/wiki/Windsor_and_Eton_Central_railway_station
After reading the Wikipedia link you provided, I would say "Yes", the Queen was, and is more than likely a Broad Gauge GWR locomotive....Thanks! :thumbs_up:
