Looks to perhaps be an attempt at resurrecting another Spanish mystery uniform ( M65 ) about which we at least know the designation ( but not too much else).
It also looks similar to one of the 2 Lightweight Green dominant uniforms that appeared in the mid '80s, but that uniform is much simpler in construction.
Blouse seems to follow the classic TAP56 design, and again, looks similar to one of the Green Dominant Lightweights.
Trousers seem to follow old world tailoring, especially the hand and rear pockets, which are made from separate material and are sown into the waistband like old tailored European trousers.
A few years ago, I rescued the field jacket from one of the Thai rag merchants, and not too long ago, the same merchant had a lightweight shirt in the same pattern which went to another buyer.
Here it goes..