Thanks for the responses Mr Matt and Brad; it is actually designed for 1/35th scale and or 1/32nd scale figures and vehicles, although it works fine with 1/30th scale as well.
Matt; it is modular for sure. You can set it up the way I did, or you can put the railyard piece either in front of or behind the large smokestack position; you can also put the two infantry positions either in front or behind the factory too.
It is made of heavy modeling plaster, the factory walls and support beams are made of a lighter resin. The factory is flat packed and needs to be assembled.
All of the pieces are available through me either painted or unpainted, I've sold 90% of them painted, but do sell unpainted ones at the various model shows I attend............