I might have a performance data sheet somewhere and possibly a brochure. This is a 1950's style industrial gas turbine. I think it has a single combustor. Rating about 5MW I think. Main application was oil pumping and gas compression. I don't think they were used in generating sets. Sites I remember was the Iraq - Syria oil pipeline pumping stations. Gave long service but not very efficient by modern standards. Museum piece!
I realise that you posted this a couple of months ago, however I was researching the older gas turbines and came across this thread. Not sure of this helps, but I gather Greenray support these machines, they may have a manual.