BRIEF-S.Africa's platinum producers say note AMCU march in Pretoria

JOHANNESBURG, March 6 (Reuters) - Lonmin LONJ.J LMI.L , Implats IMPJ.J , Amplats AALJ.J :

* Says have noted today's AMCU march to the union buildings in Pretoria

* Confirm that we were invited to send representatives to be available to receive a memorandum, though did not do so

* Remain committed to talks within our settlement zone and in good faith

* Look forward engagement as soon as the union is willing to do so on this basis.

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