u/LibraryCharacter4266

So my grandma recently gave me this pair of earrings which she said belonged to my grandad’s (=her husband) godmother. I wear them a lot, I think they’re gorgeous.
I am trying to figure out who made them, when and what they are made of. I am tackling the metal first - with a loupe, I can read 750 on the wire (which means it’s 18k gold). There is an oval shaped mark next to the 750 inscription which I am having trouble reading and identifying. It appears to read : M, A(weird font?), triangle shape, an apostrophe, B. I tried to look it up online as a makers mark but nothing comes up… I also don’t know what country it is from but thought maybe the fact that it’s not a lozenge shaped makers mark would mean it’s not French? Does anyone have any clue as to what the mark could be and who it corresponds to?
Thank you for the help!

(Last picture was before I cleaned the ring so the mark looks a bit dirty)

This is a French bug brooch posted on r/VintageJewelry . It has a boar's head mark and a lozenge mark (the details of which I can't read well). I tried to take a zoomed-in picture to post it here (2nd picture). There is also an inscription of some sort (6 letters) close to the maker's mark which I can't decipher (3rd and 4th pictures, different lighting, and only the first 4 letters are visible on the 4th picture)... Any help would be greatly appreciated!

sMy grandmother recently showed me this brooch which she bought off an antiquarian friend decades ago. Can anyone ID the two marks visible on the metal? What type of metal is it (gold, silver or something else?) Anyone has any idea whats the era or approximate date of this brooch?