May 18, 2002
* H.A. Lukkien has given us scans of several different dutch coins.
February 20, 2002
* Egbert Buchem has given us scans and information of a city coin of Sittard.
June 2000
* Joost de Vries has given us scans of several different dutch coins.
January 28, 1999
* Patrick Plomp has given us scans of several gold 10 guilder pieces.
* Wladimir van Heemst gave us the mintage numbers of three different euro tokens.
June 26, 1998
* Tom Passon, of the magazine MUNTkoerier, has given us lots of photomaterial of the 1790-1815 period.
September 22, 1996
* Marc Beoutis has helped us to two addresses of Australian Numismatic publications.
September 13, 1996
* Bob Gilreath has helped us by testing the new improved Numismania site, thanks a million Bob.
March 10, 1996
* H.A. Groend contributed information about the 'Royal Dutch Society for Numismatics' and gave also an update of the addresses of Dutch Coin Clubs.
Februari 29, 1996
* Peter van Harten contributed a regional issue of a Dutch coin. The 'poffer'.
Februari 9, 1996
* Brian Isfeld contributed a number of really good looking images of coins of the Dutch East Indies.
This is the home page of Brian.
Januari 29, 1996
* Maja van den Brink contributed some Dutch counterfeited coins.
November 23, 1995
* Antti Hamalainen contributed addresses of the Mints of Germany, Greece, Norway, Denmark, Finland, Sweden, Australia and Switzerland.
August 21, 1995
* Peter Kraneveld contributed some interesting articles.
July 14, 1995
* Frederik Jan Jüngen
From the Numismatic web-site we got the addresses of some Mint's around the world next to the one we already had.