The International Rail Makers Association (IRMA) was a cartel for the export of rail profiles that existed (with longer interruptions) between 1883 and the Second World War.
[2] This name change was due to the reluctance of the American producers to join officially because of fear of antitrust entanglements.
The seat of IRMA was (since at least 1926): London (11, Ironmonger Lane).
IRMA became defunct due to Second World War and the subsequently aggravated US antitrust.
For 1883, the IRMA members and their shares were as follows:[3] Soon after this scheme was revised to: In 1904, the following distribution was agreed on: In 1912, the scheme was changed to: For 1927, the larger members of ERMA and their shares were as follows:[4] Smaller members were: Poland, Austria, Hungary, Italy and some independent business groups.