Identifying Backstamp initials

[pep119]

Hi everyone!

I am ready to post this costume vintage necklace which I recently purchased at an estate auction. Can anyone identify these initials, which are I believe, CDG? Necklace is ivory and dary enamel inlay on gold tone links. Thanks in advance, pep119

[pep119]

Hi, I am now thinking it may be a copyright symbol with initials DG, but I still cannot determine designer name - any help?