It would be difficult at best to say without seeing the mark. So, check the link below to match it.
I can only think it might be the finger sizeIt sounds more like a hallmark stamp of the maker/company.
Metal that is plated in gold can not have the stamp.
Date stamp of 1890
I have a similar Hallmark on an antique watch chain, gilded
DSC is the stamp of the sponsor, or maker. The crown is the stamp of the assay office that assures the quality of the material. The crown might me a castle, which would inidicate that the ring has been stamped in the Edinburgh assay office. The number 375 shows that the ring is made from 9 carat gold.
trademark, sure sign, telltale, mark, device, stamp, seal, symbol
Dpl is the manufactures stamp what it stands for i couldnt tell you, but its the jewlers hallmark.
A maker stamp
Dpl is the manufactures stamp what it stands for i couldnt tell you, but its the jewlers hallmark.
It is Italian for a postage stamp.
Perhaps "AZ" is the initials of the jeweller who originally made the earrings, or maybe they were made in the state of Arizona.
JCM is the trademark stamp of the jewelry company Jacmel. Jacmel makes jewelry products and other gift products for Hallmark Cards.