Need help with vintage silver pearl earrings

[mikewallace]

Need help identifying this makers mark, Thanks.

[mikewallace]

The letter is a W in case somebody can't make it out.

[JLDoggett]

That looks like the Mikimoto mark but up-side-down. It should look like an M on aan oyster-shell.

[mikewallace]

Thanks so much, this forum is amazing.

[dognose]

A 1957 advertisement from Mikimoto that confirms the above:


Mikimoto - Tokyo - 1957


Mikimoto device

Trev

[JLDoggett]

Thanks Trev, I didn't have time to locate one of my pictures of the mark.

[chrismittty]

So I saw this and thought it to be relevant, when marked "SILVER" as such, its likely to be what purity?
I have come across quite a few items like such marked like that and was curious....