While doing some research on my own ancestors from Prügy, i found quite a bit about your Seres line. They lived in Worden, IL for many years and it appears that were neighbors to my Király side. My gg-father must have known Jozsef Seres quite well as it seems that they worked together in the same mine. A number of the Seres' also attended my gg-parents funerals.
To start, have a look here...there is a photo:http://madisoncountycircuitclerk.contentdm.oclc.org/cdm/ref/...
i've also created a profile for a few of the Seres' in my Ancestry tree, hoping to find a link between the two lines.