I got a reply from Rich's brother Jeff. He sent me an obituary which I'm reproducing here for the record:
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Obituary for Rich Hartzog
Richard A. Hartzog died November 11, 2017 of Metastatic Bladder Cancer.
Born November 4, 1947 in Chicago and raised in Wheaton, IL. Hartzog moved to Rockford after attending the University of Wisconsin at Platteville. Predeceased by his parents Walter

Hartzog and Virginia J. Hartzog, his sister Terri L. Hartzog and his Lady June Shigley. He is survived by his brother Jeffrey L. Hartzog the World Traveler, Sister Nancy J. White of Colorado, daughter Jennifer Hartzog of South Beloit, nephew Tyler White of Kansas City, and his inherited daughters: Karen (Tim) McCaugheny of Lombard, Jennifer Kross of Peachtree City GA and Kerryanne Shigley of Loves Park.
Hartzog was a collector and dealer specializing in tokens, medals and other small collectibles including 19th century Illinois Exonumia. He issued numerous auction catalogs and sold at shows and on-line over the course of 45+ years of business. Under the name World Exonumia Press he published several books of his own and others. Hartzog was president of the Chicago Coin Club 1979 to 1982. He has served on the board of governors for the CSNS, CWTS, TAMS, Illinois Numismatic Association and others.
A “Celebration of Life” for Rich will take place at lksjer on January 13, 2018 at lskjdf. Interment will be at the Montrose Cemetery in Chicago.
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