When was the marimbula invented?

The marimbula is a homemade instrument of which you will not find much research about so if conduct an ISU for example here is not a good reliable source because decently known facts have said that all answers submitted to this site about the marimbula have no evidence regarding to the truthfully written background information therefore this site is only 33.5% true when the results come to the littily known subject of the marimbula.