Extreme Championship Wrestling stands for ECW an old wrestling firm like: WWE, WWF, TNA or WCW
Extreme Championsip Wrestling ^ before that it was Eastern Championship Wrestling
Extreme Championship Wrestling - 2006 The New Face of Extreme was released on: USA: 13 January 2009
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ECW is a wrestling company and it stands for Extreme Championship Wrestling
wwe.com
Southwest Championship Wrestling ended in 1985.
Championship Wrestling from Florida ended in 1987.
Georgia Championship Wrestling ended in 1984.
World Championship Wrestling ended in 2001.
Southern Championship Wrestling ended in 2004.