Help Identify Egyptian??? Hallmark

[ADRIANOS2017]

Hello good people. I purchased an amethyst tennis bracelet from flee Market today and is have an weird hallmark. I am definitely sure is silver as it was tarnished and I have cleaned with silver solution but anyone know this hallmark? Thanks in advance

[AG2012]

Hi,
It is Cairo Egypt Assay office, and number 900 in Arabic indicating silver standard (fineness).
Other marks are missing (national mark and day letter) but it`s not uncommon to see in Egyptian jewelry (most likely late 20th century).
By the way, when judging silver, silver plate, and non precious metals, do not rely on tarnish or patina, that can be misleading.
Regards