Earring help

[Aferneau]

Hey guys, this is my first visiting and posting on a Forum, so if I am doing something I'm not suppose to please forgive me and kindly correct me. I am in need of help in Identifying some markings on some earrings I found. These are the best pictures I was able to get of the markings. Do any of you know what these markings are or if they are stamps or just accidental? Anything helps. Thank you guys.

 

[Bron357]

Given the discolouration I would presume that that are not precious metal. The marks seem to be manufacturer marks. Higher quality “costume jewellery”, as non precious metal jewellery pieces are referred to as, are usually marked similarly and some pieces and makers are very collectible.
If you can clean the marks with a toothbrush and soapy water and not so much light it will be easier to read. Also a picture of the actual earrings can help identify the era.

 

[Aferneau]

Given the discolouration I would presume that that are not precious metal. The marks seem to be manufacturer marks. Higher quality “costume jewellery”, as non precious metal jewellery pieces are referred to as, are usually marked similarly and some pieces and makers are very collectible.
If you can clean the marks with a toothbrush and soapy water and not so much light it will be easier to read. Also a picture of the actual earrings can help identify the era.

Yeah here's a picture of the whole earrings. I tried to get a close picture without as much light and its really hard to make out the stamps, and the light makes the jewelry look very brassy but they are more of dull yellow like a low carat gold. I buy and sell gold and silver jewelry often and come in contact with a lot of costume and brass jewelry but i have never seen markings like these before on costume jewelry, markings these deep and profound I usually see on gold or silver. Also, Thank you for the help.