I have to make a clarification.
In the picture I posted previously, the word MONSERRAT had been reduced. In the photos below I have kept the proportions.

It is clear that the C.LEON and MONSERRAT mark have the same size and the same font.
It seems a bit strange to me that the assayer and the maker have such a similar mark.
Unfortunately I photographed quickly and with little light and I have not photographed the back. Even to me the two trays seemed genuine and the handles are assembled with old looking screws.
Thanks anyway for every contribution.
Amena