The actions which I have personally observed were: converted military, thumb cut in left sidewall, etc. Early pattern commercial, full inner collar in receiver ring, cut for extractor only. Mid-production commercial, inner receiver collar cut left and right for ease of production. Late commercial pattern, no inner collar whatsoever, firing pin like a M93/96, no flange to engage cut in bolt body, (which absolutely prevents a discharge unless the bolt is rotated to lock). This latter would be the least desirable, on a par with a Midland, for gas handling. If you look on the left side of the receiver tang, you will often see a grind mark. This is where the "Spain" was removed. I have never personally inspected a PH that I could absolutely indentify as being other than Spanish in origin.
PH bought parts from wherever, and then assembled rifles. AFAIK all the stocks are Sile brand, made in Italy. Having rebarreled a number of them, of different vintages, I can report that there is a noticable lack of dimensional standardization on the barrel threads. Military Mausers, regardless of when and where made, show better QC. The little flange on the safety which blocks the sear is prone to breakage. PH barrels are the only ones I have observed which will shatter or blow off pieces if fired with a barrel obstruction in the cold. All other makes observed will bulge, crack or split. I am not big on PH Mausers, but then again most of the ones I worked on were rode hard and put away wet. The setup for the detachable magazine is, well, creative, and makes disassembly of the rifle awkward.
I did sell one PH, an earlier one, in .375H&H. It was the plain model intended as a working rifle for professional hunters. It was a solid, well built, all business rifle.
Most PH owners like the rifles, and report that they are fine shooters.