Rodnay and Peter:
Interesting Wikipedia article. Thanks Rodney, good information. Thanks, too Peter, for the current location of Chicago Lawn Station.
When checking Google maps, it looks like Vargo Stamps operated from a two-story duplex about 9 blocks east and 1 1/2 blocks south of Chicago Lawn Station. Probably a part-time dealer operating out of his home. See link below.
Don
https://www.google.com/maps/place/6...d-87.6922826