The coming months I plan to stage a few 6mm scifi battles as part of the developing Antares campaign setting. Hence, I brought out my 6mm stuff, mostly dating to the GW Space Marine days.
However, I also unearthed the buildings below, of which I do not remember the origin. I think I bought them around 2003-2004, but they might be much older than that.
If anyone can help me with identifying the manufacturer, I would be very thankful!
Update May 25, 2015: It appears these buildings are still available from Second City Games, or SHQ Miniatures (although it is hard to confirm the latter, since there are no pictures on their website for 6mm scenery).
Funny detail: I named the city blocks in the picture above in true Judge Dredd style: James T. Kirk block, Harrison Ford block, and John Carter block.