My wife and I have attempted a rather lengthy internet search regarding a postcard publisher by the name of F.M. Doblmeier. He published a series of postcards with New York City landmarks, done by an artist who signs his watercolor works as "K Roller" (Samuel Kagey Roller is the artist actual name, who is my great-grandfather). Does anyone have information about what happened to this publishing company? Or perhaps have seen any of the at least 14 postcards done by artist K Roller? I have attached an image of one. My family would love to, at the very least, compile a list of all the ones that were published with his artwork, and at the very most collect copies of each! Thanks!