What does the fixed cup look like? If it follows the Campagnolo standard, one of the aforementioned Park or Sugino hook spanners will have a fixed cup opening opposite the hook.



Otherwise, the Sheldon Brown universal tool is an option:


Tool Tips--Bottom Bracket Cups

Or the professional version of the Sheldon Brown tool:


https://www.efficientvelo.com/produc...b-cup-remover/