Curious if anyone is familiar with symbol hallmarks on the end tips of the clasp tongue?

[hadam]

I was told necklace had an18k clasp, it measures 3/4” and pearls are 7mm round. It is 20 inches. Today I was look for a stamping of the gold karat but only found symbols that I can’t make out. There is one symbol on each tip of clasp tongue. The clasp itself is white metal over yellow metal and 3 pearls on the clasp are strung on a yellow metal pin.
I would appreciate any opinions because I am not sure what era this from and why it does not say 18k or 750 only 2 character symbols.
Thank you for your help.