Please help to identify french silver mark

I inherited knife and fork set of 12.
Please help me to identify French sterling silver marks.
I attached Minerva with figure 1 mark to show that it is French sterling, but the other 2 marks’ images I cannot find anywhere .
Mark on handle is in rectangle and on blade is diamond.
Thank you!

The CD marks are those of the maker. In a diamond it signifies solid silver and in a rectangle it signifies electroplate. I cannot find this maker listed in either of the 2 sites I know for French makers’ marks.