Philip Stein Signature Small

This watch was listed as a running, mens watch, with a 986 movement.I had no recollection of the style in the catalogs. I assumed it was likely a womens model and not a 'jobber' case model because the enamel dial says 'Hamilton' and not 'Hamilton movement'.So, I took a chance thinking a running 986 might be useful at some point. It arrived and I popped the case open to see it is indeed a 986A movement, and the case is factory marked Hamilton 14kgf.But, the only model close to this one in the c........

I don't have any expertise to speak of in watch collecting, but my grandfather was recently gifted a Patek Philippe watch, a perpetual calendar model, by one of his (presumably wealthy, since the watch is apparently worth at least $20K) friends. I figured that this would be a good place to satiate my curiosity about said watch, especially since I haven't been able to find information pertaining to the particular model anywhere else on the Internet. The issue is that the reference number (I would........