Help identifying inherited pearls

[Powelso]

Hi everyone, just after a bit of help identifying these pearls I’ve inherited. my mum always said they were mikimoto but reading about them I can’t see the right stamps on the clasp. I can see 375 and the knots on the string look quite crude. Thanks in advance!

 

[Pearl Dreams]

Hi Powelso,

375 is 9 karat gold (375 parts gold out of 1000).

They do look like akoya cultured pearls but I think they must have simply been placed in a Mikimoto box.