Geometric composition paintings from 1959 monogram M

3 paintings of geometric compositions called biomorphic from 1959 with the monogram m. 2 paintings are painted on wooden panels and one on hardboard panel. Dimensions of the paintings: 24cm by 30cm for each painting. The paintings are magnificent and come from a great collector. (a very serious gentleman). And I don't have the time to chase after all the experts of each painter... And yet I am convinced that it must be a known and recognized painter. Especially to sign with a monogram. So I'm putting them up for sale.