Hartman aan de Zuider-GasfabriekKorte, deMattumVolkerRailStrike, wage raise - 1891Lockout, workers protested against the factory regulations - 1907Strike, wage raise - 2011Strike, against the results of a reorganization - 2012Strike, against the results of a reorganization - 2015demonstration, collective agreement demanded by the employees - 2015Strike, wage raise - 1907Strike, against a wage cut - 1903Strike, collective agreement demanded by the employees - 1929Strike, wage raise - 1928