Born in Salt Lake City, Utah. Served in the Navy during WWII. Married to Marcelle in 1953 with two children. Employed in government service with the Navy and Air Force 1943 to 1967.

Since 1968 he has been a dealer in Long Beach, California, DBA Zaidman & Lopresto Rare Coins and Jewelry. PNG member after 1986. Owner of the Long Beach Numismatic, Philatelic & Baseball Card Exposition. It has become one of the most important and popular shows in the country. In 1992 majority ownership of the show was sold to Ron Gillio and Paul Koppenhaver. In 1993 he received the ANA Glenn Smedley Memorial Award. In 1994 he received the Medal of Merit.

He died at home in Torrance, California.

bio by correspondence, 1991 profile: CW/CP 10/9/91