Swan Neck Regulator
It's called a "regulator" because it is one. The swan neck regulator helps regulate the timing of the watch to certain watch association specifications, i.e. COSC. When your watchmaker regulates a watch, he/she adjusts the beat so that the movement beats according to spec and then uses the regulator to adjust timing of watch so it meets the standard. Swan neck regulator allow the adjustment to be made in a very precise manner.
2. PAM 111 comes out as limited batch every year hence the additional postfix at the end of the model number. "h" denotes the h-year post Vendome acquisition in 1998 hence "h" normally indicates all PAM 111 manufactured in year 2005. This has something to do with the different details a watch may carry because different year may have different bridges engravings, font size/color, AR vs. NO-AR, etc. For PAM 111H, the correct bridge engraving is the Cotes de Geneve version which is the simple shell-patterned engravings of the movement back (someone can help out here and post pics of it, I'm too lazy for it ^_^ )
3. PAM lume. I think almost all PAM reps now have some sort of lume applied. They differ in the application and grade they carry. PAM's gen lume is the superluminova
kind and I was told it was a mixture of c1 and c3 grades superluminova, but some have also argued that it's a full c3 grade. Prior to using superluminova PAM had used radium (hence the radiomir series, and highly radioactive), luminova (hence the luminor series), and had also used tritium in some of the luminor series before it was forbidden by law. The most accurate reproduction of PAM lume I've seen have come from these modders: Vac, Ziggy, Flav, Rev. DSNs watches come superlumed and is fairly good but compared to the works done by the modders mentioned, it's still a few levels below them.